Annual report pursuant to Section 13 and 15(d)

Receivables and Unbilled Receivables - Narrative (Details)

v3.20.4
Receivables and Unbilled Receivables - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Receivables [Abstract]    
Allowance for doubtful accounts $ 1,493 $ 396
Government contracts receivable $ 2,600 $ 15,200