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Revenue Recognition (Details Narrative) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Revenue Recognition [Abstract]      
Accounts receivable from contracts with customers, net of allowance for doubtful accounts $ 1,900   $ 2,500
Deferred revenue from contracts with customers $ 1,335 $ 1,132 $ 1,100