11. STOCK BASED COMPENSATION (Details - Stock Option Activity) - Options [Member]
$ / shares in Units, shares in Thousands, $ in Thousands |
12 Months Ended |
|
Dec. 31, 2019
USD ($)
$ / shares
shares
|
|---|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
| Options outstanding, beginning balance | shares |
2,477
|
| Options exercised | shares |
0
|
| Options expired | shares |
0
|
| Options outstanding, ending balance | shares |
2,934
|
| Options exercisable | shares |
2,154
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Prices [Roll Forward] |
|
| Weighted average exercise price, options outstanding beginning balance |
$ 6.81
|
| Weighted average exercise price, options granted |
3.90
|
| Weighted average exercise price, options exercised |
|
| Weighted average exercise price, options expired |
|
| Weighted average exercise price, options outstanding, ending balance |
6.36
|
| Weighted average exercise price, options exercisable |
$ 6.79
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted-Average Remaining Contractual Term [Roll Forward] |
|
| Weighted average remaining contractual term, options outstanding |
6 years 10 months 25 days
|
| Weighted average remaining contractual term, options exercisable |
6 years 4 months 24 days
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Intrinsic Value [Roll Forward] |
|
| Intrinsic value, options outstanding ending balance | $ |
$ 0
|
| Intrinsic value, options exercisable | $ |
$ 0
|