Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable, net (Details)

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Accounts Receivable, net (Details) - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Accounts receivable, net    
Billed receivables $ 8,175,000 $ 5,352,000
Unbilled receivables 2,221,000 705,000
Total accounts receivable, net 10,396,000 6,057,000
Allowance for doubtful accounts $ 0 $ 0