Quarterly report pursuant to Section 13 or 15(d)

The Company???s intangible assets at June 30, 2021 include patents with estimated remaining economic useful lives ranging from 0.25 to 12.25 years. For all periods presented, all of the Company???s patents were subject to amortization. The gross carrying

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The Company’s intangible assets at June 30, 2021 include patents with estimated remaining economic useful lives ranging from 0.25 to 12.25 years. For all periods presented, all of the Company’s patents were subject to amortization. The gross carrying amou (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]    
Patents, net $ 1,498,000 $ 1,578,000
Patents [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount - patents 7,915,000 7,848,000
Accumulated amortization - patents (6,417,000) (6,270,000)
Patents, net $ 1,498,000 $ 1,578,000