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Accounts Receivable | 6 Months Ended
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Jun. 30, 2022
Receivables [Abstract] |
Accounts Receivable | 3. Accounts Receivable
(table only in thousands) |  | June 30, 2022 |  |  | December 31, 2021 |
Contract receivables |  | $ | 75,841 |  |  | $ | 65,932 |
Trade receivables |  |  | 23,285 |  |  |  | 12,537 |
Allowance for doubtful accounts |  |  | (3,808 | ) |  |  | (3,478 | )
Total accounts receivable |  | $ | 95,318 |  |  | $ | 74,991 |
Balances billed but not paid by customers under retainage provisions in contracts within the Condensed Consolidated Balance Sheets amounted to approximately $1.6 million and $1.8 million at June 30, 2022 and December 31, 2021, respectively. Retainage receivables on contracts in progress are generally collected within a year or two subsequent to contract completion, and are recorded in either accounts receivable, net or deferred charges and other assets within the Condensed Consolidated Balance Sheets depending on timing of expected collection. Bad debt expense was approximately $0.4 million and $0.1 million for the three-month periods ended June 30, 2022 and 2021, respectively, and $0.4 million and $0.1 million for the six-month periods ended June 30, 2022 and 2021, respectively.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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- References No definition available. + Details
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