Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Details - Option activity)

v3.20.1
STOCK-BASED COMPENSATION (Details - Option activity) - Equity Option - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Options outstanding, beginning balance (shares) 28,105  
Options outstanding, granted (shares) 4,870  
Options outstanding, exercised (shares) (436)  
Options outstanding, forfeited (shares) (7,004)  
Options outstanding, ending balance (shares) 25,535 28,105
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted average exercise price, beginning balance (in USD per share) $ 0.80  
Weighted average exercise price, granted (in USD per share) 0.33  
Weighted average exercise price, exercised (in USD per share) 0.37  
Weighted average exercise price, forfeited (in USD per share) 0.65  
Weighted average exercise price, ending balance (in USD per share) $ 0.76 $ 0.80
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Options outstanding, exercisable (shares) 19,667  
Options outstanding, vested or expected to vest (shares) 25,535  
Weighted average exercise price, exercisable (in USD per share) $ 0.67  
Weighted average exercise price, vested or expected to vest (in USD per share) $ 0.76  
Weighted average remaining contract term 6 years 4 months 2 days 5 years 4 months 25 days
Weighted average remaining contract term, exercisable 5 years 5 months 4 days  
Weighted average remaining contract term, vested or expected to vest 6 years 4 months 2 days  
Aggregate intrinsic value $ 3,003 $ 12,335
Aggregate intrinsic value, exercisable 2,047  
Aggregate intrinsic value, vested or expected to vest $ 3,003