Accounts Receivable

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Accounts Receivable

3.     Accounts Receivable

(table only in thousands)	March 31, 2021			December 31, 2020
Contract receivables	$	58,193		$	57,435
Trade receivables		11,151			8,721
Allowance for doubtful accounts		(2,876	)		(3,110	)
Total accounts receivable	$	66,468		$	63,046

Balances billed but not paid by customers under retainage provisions in contracts within the Condensed Consolidated Balance Sheets amounted to approximately $1.5 million at March 31, 2021 and December 31, 2020, respectively. Retainage receivables on contracts in progress are generally collected within a year after contract completion.

The Company had net recoveries of bad debts of approximately $41,000 for the three-months ended March 31, 2021 compared with bad debt expense of approximately $46,000 for the three-months ended March 31, 2020.