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Stock-based Compensation (Details - RSA Activity) - Restricted Stock [Member]
shares in Thousands
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
RSA's outstanding, beginning balance 78
RSA's granted 60
Shares issued upon vesting (44)
RSA's forfeited 0
RSA's outstanding, ending balance 94
Weighted average grant date fair value per share | $ / shares $ 4.50