The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the unaudited condensed consolidated financial statements, and the reported amounts of revenues and expenses during the reporting periods. The significant estimates and assumptions made in the preparation of the Company's unaudited condensed consolidated financial statements include revenue recognition, stock-based compensation, income taxes and valuation of patents.  Actual results could be materially different from those estimates, upon which the carrying values were based.

On January 1, 2018, we adopted ASU. No. 2014-09, Revenue from Contracts with Customers (Topic 606), using the modified retrospective transition method applied to those contracts which were not completed as of January 1, 2018.  Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts have not been adjusted and continue to be reported in accordance with our historic accounting under Topic 605.

Under Topic 606, revenue is recognized when we complete the licensing of our intellectual property to our licensees, in an amount that reflects the consideration we expect to be entitled to in exchange for licensing our intellectual property.

We determine revenue recognition through the follow steps:

Revenue disaggregated by revenue source for the three and six months ended June 30, 2018, consists of the following:

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(1)  Revenue from the sale of the Company's unsecured claim against Avaya, Inc. to an unaffiliated third party (see Note I- "Legal Proceedings").

The Company relies on royalty reports received from third party licensees to record its revenue.  From time to time the Company may audit royalties reported from licensees. Any adjusted royalty revenue as a result of such audits is recorded by the Company in the period in which such adjustment is agreed to by the Company and the licensee or otherwise determined.

Revenue from the Company's patent licensing business is generated from negotiated license agreements.  The timing and amount of revenue recognized from each licensee depends upon a variety of factors, including the terms of each agreement and the nature of the obligations of the parties.  These agreements may include, but not be limited to, elements related to past infringement liabilities, non-refundable upfront license fees, and ongoing licensing royalties on licensed products sold by the licensee.  Generally, in the event of settlement of litigation related to the Company's assertion of patent infringement involving its intellectual property, defendants will either pay (i) a non-refundable lump sum payment for a non-exclusive fully-paid license (a "Fully-Paid License"), or (ii) a non-refundable lump sum payment (license initiation fee) together with an ongoing obligation to pay quarterly or monthly royalties to the Company for the life of the licensed patent (a "Royalty Bearing License").

The Company's license agreements, both Fully-Paid Licenses and Royalty Bearing Licenses, typically include some combination of the following: (i) the grant of a non-exclusive license to manufacture and/or sell products covered by its patented technologies; (ii) the release of the licensee from certain claims, and (iii) the dismissal of any pending litigation.  The intellectual property rights granted pursuant to these licenses typically extend until the expiration of the related patents.  Pursuant to the terms of these agreements, the Company typically has no further performance obligations with respect to the grant of the non-exclusive licenses.  Generally, the license agreements provide for the grant of the licenses, releases, and other obligations following execution of the agreement and the receipt of the up-front lump sum payment for a Fully-Paid License or a license initiation fee for a Royalty Bearing License.

Ongoing Royalty Payments:  Certain of the Company's revenue from Royalty Bearing Licenses results from the calculation of royalties based on a licensee's actual quarterly sales (one licensee pays monthly royalties) of licensed products, applied to a contractual royalty rate.  Licensees that pay royalties on a quarterly basis generally report to the Company actual quarterly sales and related quarterly royalties due within 45 days after the end of the quarter in which such sales activity takes place.  Licensees with Royalty Bearing Licenses are obligated to provide the Company with quarterly (or monthly) royalty reports that summarize their sales of licensed products and their related royalty obligations to the Company.  The Company receives these royalty reports subsequent to the period in which its licensees underlying sales occurred.  The amount of royalties due under Royalty Bearing Licenses, each quarter, cannot be reasonably estimated by management.  Consequently, the Company recognizes revenue for the period in which the royalty report is received in arrears and other revenue recognition criteria are met.

Non-Refundable Up-Front Fees:  Fully-Paid Licenses provide for a non-refundable up-front payment, for which the Company has no future obligations or performance requirements, revenue is generally recognized when the Company has obtained the signed license agreement, all performance obligations have been substantially performed, amounts are fixed and determinable, and collectability is reasonably assured.  Revenue from Fully-Paid Licenses may consist of one or more installments.  The timing and amount of revenue recognized from each licensee depends upon a number of factors including the specific terms of each agreement and the nature of the deliverables and obligations.

The Company uses the assets and liability method of accounting for income taxes to record deferred income taxes for the tax consequences of temporary (timing) differences by applying enacted statutory tax rates applicable to future years to differences between financial statement carrying amounts and the tax bases of existing assets and liabilities and operating loss and tax credit carry forwards.

Under this accounting standard, the effect on deferred income taxes of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recognized if it is more likely than not that some portion, or all of, a deferred tax asset will not be realized.

ASC 740-10, "Accounting for Uncertainty in Income Taxes," defines uncertainty in income taxes and the evaluation of a tax position as a two-step process. The first step is to determine whether it is more likely than not that a tax position will be sustained upon examination, including the resolution of any related appeals or litigation based on the technical merits of that position. The second step is to measure a tax position that meets the more-likely-than-not threshold to determine the amount of benefit to be recognized in the financial statements. A tax position is measured at the largest amount of benefit that is greater than 50 percent likelihood of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent period in which the threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not criteria should be de-recognized in the first subsequent financial reporting period in which the threshold is no longer met.  The Company had no uncertain tax positions as of June 30, 2018 and December 31, 2017.

United States federal, state and local income tax returns prior to 2014 are not subject to examination by any applicable tax authorities, except that tax authorities could challenge returns (only under certain circumstances) for earlier years to the extent they generated loss carry-forwards that are available for those future years.  On July 19, 2018, the Internal Revenue Service notified the Company that it was examining its 2016 federal tax return.

On December 22, 2017, the 2017 Tax Cuts and Job Act was enacted into law and the new legislation contains key tax provisions that affect us.  We are required to recognize the effect of the tax law changes in the period of enactment, such as determining the transition tax, remeasuring our U.S. deferred tax assets and liabilities as well as reassessing the net realizability of our deferred tax assets and liabilities.  In December 2017, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), which allows us to record provisional amounts during a measurement period not extended beyond one year of the enactment date.

The personal holding company ("PHC") rules under the Internal Revenue Code impose a 20% tax on a PHC's undistributed personal holding company income ("PHC Income"), which means, in general, taxable income subject to certain adjustments.  For a corporation to be classified as a PHC, it must satisfy two tests: (i) that more than 50% in value of its outstanding shares must be owned directly or indirectly by 5 or fewer individuals at anytime during the second half of the year (after applying constructive ownership rules to attribute stock owned by entities to their beneficial owners and among certain family members and other related parties) (the "Ownership Test") and (ii) at least 60% of its adjusted ordinary gross income for a taxable year consists of dividends, interest, royalties, annuities and rents (the "Income Test").  In the second half of 2018 to date (as well as during the second half of prior years), the Company did not meet the Ownership Test.  Due to the significant number of shares held by the Company's largest shareholders, the Company continually assesses its share ownership to determine whether it meets the Ownership Test.  If the Ownership Test were met and the income generated by the Company were determined to constitute "royalties" within the meaning of the Income Test, the Company would constitute a PHC and the Company would be subject to a 20% tax on the amount of any PHC Income that it does not distribute to its shareholders.

Stock-based compensation to employees, including grants of employee stock options and restricted stock units, are recognized in the unaudited condensed consolidated statements of income and comprehensive income based on their grant date fair values. Compensation expense related to awards to employees is recognized on a straight-line basis based on the grant date fair value over the associated service period of the award, which is generally the vesting term. Share-based compensation issued to non-employees are recorded at their fair values, and are periodically revalued as the equity instruments vest and are recognized as expense over the related service period and are expensed using an accelerated attribution model. The Company uses the Black-Scholes option pricing model to determine the grant date fair value of options granted.  The fair value of restricted stock units is determined based on the number of shares granted and either the quoted market price of the Company's common stock on the date of grant for time-based and performance-based awards, or the fair value on the date of grant using the Monte Carlo Simulation model for market-based awards (see Note D hereof for further discussion of the Company's stock–based compensation).

Fair value is a three-level valuation hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

The three levels of inputs are defined as follows:

Level 1 inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3 inputs to the valuation methodology are unobservable.

The carrying value of cash, other investments, royalty receivables, other assets, accounts payable, and accrued expenses approximate fair value because of the short period of time between the origination of such instruments and their expected realization and their current market rates of interest.  Other investments available for sale are measured at fair market value.

The Company has reclassified certain amounts in prior period condensed consolidated financial statements to conform to the current period's presentation.  These reclassifications have no effect on the accompanying unaudited condensed consolidated financial statements.