Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation (Details Narrative)

v3.5.0.2
Stock-based compensation (Details Narrative) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Dec. 31, 2015
Reversed options $ 1,392,000   $ 1,392,000  
Employee stock-based compensation expense 254,000 $ 738,000 1,691,000  
Increase (decrease) in stock-based compensation expense (1,138,000)   299,000  
Unrecognized compensation expense $ 1,986,000   $ 1,986,000  
Weighted average period, cost not yet recognized, period for recognition     2 years 4 months 24 days  
Options outstanding under plan 24,651,200   24,651,200 43,071,000
Shares available for future issuance 47,885,000   47,885,000 29,485,000
Vested options 21,598,860   21,598,860  
Vested options, value $ 7,619,000   $ 7,619,000  
Vested options, remaining term     4 years 2 months 12 days  
Options exercisable 21,598,860   21,598,860  
Options exercisable, value $ 6,342,000   $ 6,342,000  
Options exercisable, price $ .17   $ .17  
Options exercisable, remaining term     3 years 8 months 12 days  
Stock price $ 0.49   $ 0.49  
Equity Incentive Plans [Member]        
Shares authorized for issuance under equity incentive plan 72,536,000   72,536,000  
Options outstanding under plan 24,651,200   24,651,200  
Shares available for future issuance 47,885,000   47,885,000