Annual report pursuant to Section 13 and 15(d)

EARNINGS (LOSS) PER SHARE (Details)

v2.4.1.9
EARNINGS (LOSS) PER SHARE (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Earnings Loss Per Share Tables    
Weighted-average common shares outstanding - basic 25,170,346us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 25,589,238us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive effect of options and warrants 1,757,984us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants 2,365,447us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Weighted-average common shares outstanding - diluted 26,928,330us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 27,954,685us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Options and Warrants excluded from the computation of diluted income (loss) per share because the effect of inclusion would have been anti-dilutive 1,942,016nssi_OptionsAndWarrantsExcludedFromComputationOfDilutedIncomeLossPerShareBecauseEffectOfInclusionWouldHaveBeenAntidilutive 4,417,053nssi_OptionsAndWarrantsExcludedFromComputationOfDilutedIncomeLossPerShareBecauseEffectOfInclusionWouldHaveBeenAntidilutive