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NOTE 8 - STOCKHOLDERS' EQUITY (Details) - Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options, Range of Exercise Prices, Lower Limit $ 1.68
Options, Range of Exercise Prices, Upper Limit $ 16.27
Options, Number Outstanding (in Shares) | shares 1,639,000
Options Outstanding, Weighted Average Remaining Contractual Life 2 years 244 days
Options Outstanding, Weighted-Average Exercise Price $ 10.02
Options Exercisable and Vested (in Shares) | shares 585,000
Options Exercisable, Weighted Average Remaining Contractual Life $ 8.59
Exercise Price Range $1.68 - 8.81 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options, Range of Exercise Prices, Lower Limit 1.68
Options, Range of Exercise Prices, Upper Limit $ 8.81
Options, Number Outstanding (in Shares) | shares 529,000
Options Outstanding, Weighted Average Remaining Contractual Life 1 year 346 days
Options Outstanding, Weighted-Average Exercise Price $ 4.58
Options Exercisable and Vested (in Shares) | shares 303,000
Options Exercisable, Weighted Average Remaining Contractual Life $ 6.18
Exercise Price Range $8.82 - 13.39 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options, Range of Exercise Prices, Lower Limit 8.82
Options, Range of Exercise Prices, Upper Limit $ 13.39
Options, Number Outstanding (in Shares) | shares 595,000
Options Outstanding, Weighted Average Remaining Contractual Life 3 years 113 days
Options Outstanding, Weighted-Average Exercise Price $ 10.88
Options Exercisable and Vested (in Shares) | shares 223,000
Options Exercisable, Weighted Average Remaining Contractual Life $ 10.36
Exercise Price Range $13.40 - 16.27 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options, Range of Exercise Prices, Lower Limit 13.40
Options, Range of Exercise Prices, Upper Limit $ 16.27
Options, Number Outstanding (in Shares) | shares 515,000
Options Outstanding, Weighted Average Remaining Contractual Life 3 years 346 days
Options Outstanding, Weighted-Average Exercise Price $ 14.62
Options Exercisable and Vested (in Shares) | shares 59,000
Options Exercisable, Weighted Average Remaining Contractual Life $ 14.27