13. INCOME TAXES (Details - Deferred tax assets) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|---|
| Deferred tax assets: | |||
| Net operating loss carryforwards | $ 20,583 | $ 17,309 | |
| Tax credit | 1,462 | 1,233 | |
| Fixed assets and intangibles | 1,312 | 1,528 | |
| Stock compensation | 1,304 | 1,994 | |
| Accruals and other | 218 | 212 | |
| Lease liability | 33 | ||
| Total deferred tax assets | 24,912 | 22,276 | |
| Deferred tax liabilities: | |||
| Right of use asset | (35) | 0 | |
| Total deferred tax assets | (35) | 0 | |
| Valuation allowance | (24,877) | (22,276) | $ (19,497) |
| Net deferred tax asset | $ 0 | $ 0 |