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10. Stock-based Compensation (Details - RSA Activity) - Restricted Stock Awards [Member]
shares in Thousands
12 Months Ended
Dec. 31, 2018
$ / shares
shares
RSU's outstanding, beginning balance 0
RSU's granted 36
Shares issued upon vesting (2)
RSU's forfeited (9)
RSU's outstanding, ending balance 25
Weighted average grant date fair value per share | $ / shares $ 4.77