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Summary of Significant Accounting Policies (Details Narrative) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Inventory reserve $ 72 $ 72
Contract retentions 1,709 2,146
Allowances for doubtful accounts 397 333
Advertising costs $ 383 $ 393