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Accounts Receivable
12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Accounts Receivable

3.Accounts Receivable

 

Accounts receivable consisted of the following:

 

 

December 31,

 

(table only in thousands)

 

2019

 

 

2018

 

Contract receivables

 

$

58,881

 

 

$

48,826

 

Trade receivables

 

 

12,135

 

 

 

7,296

 

Allowance for doubtful accounts

 

 

(2,582

)

 

 

(2,897

)

Total accounts receivable

 

$

68,434

 

 

$

53,225

 

 

 

Balances billed, but not paid by customers under retainage provisions in contracts that are recorded in deferred charges and other assets within the Consolidated Balance Sheets, amounted to approximately $0.9 million at December 31, 2019 and 2018. Retainage receivables on contracts in progress are generally collected within a year or two subsequent to contract completion.

Provision for doubtful accounts was $0.3 million, $1.4 million and $3.9 million during 2019, 2018 and 2017, respectively, while accounts charged to the allowance were $0.6 million, $0.8 million and $1.5 million during 2019, 2018 and 2017, respectively.