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Accounts Receivable
9 Months Ended
Sep. 30, 2021
Receivables [Abstract]  
Accounts Receivable

3. Accounts Receivable

 

(table only in thousands)

 

September 30, 2021

 

 

December 31, 2020

 

Contract receivables

 

$

61,675

 

 

$

57,435

 

Trade receivables

 

 

11,752

 

 

 

8,721

 

Allowance for doubtful accounts

 

 

(3,403

)

 

 

(3,110

)

Total accounts receivable

 

$

70,024

 

 

$

63,046

 

 

Balances billed but not paid by customers under retainage provisions in contracts within the Condensed Consolidated Balance Sheets amounted to approximately $1.7 million and $1.5 million at September 30, 2021 and December 31, 2020, respectively. Retainage receivables on contracts in progress are generally collected within a year after contract completion.

 

Bad debt expense was approximately $0.4 million and $0.1 million for the three-month periods ended September 30, 2021 and 2020, respectively, and $0.5 million and $0.6 million for the nine-month periods ended September 30, 2021 and 2020, respectively.