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Costs and Estimated Earnings on Uncompleted Contracts | 3 Months Ended
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Mar. 31, 2021
Costs and Estimated Earnings on Uncompleted Contracts [Abstract] |
Costs and Estimated Earnings on Uncompleted Contracts | 4.COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS The Company’s costs and estimated earnings on uncompleted contracts are comprised of the following:
|  | As of |  | As of
|  | March 31, 2021 |  | December 31, 2020
|  | (in thousands)
Costs incurred on uncompleted contracts |  | $ | 62,753 |  | $ | 54,949
Estimated earnings |  |  | 25,149 |  |  | 21,778
Billings to date |  |  | (51,333) |  |  | (43,725)
|  | $ | 36,569 |  | $ | 33,002
These amounts are included in the Consolidated Balance Sheets under the following captions:
|  | As of |  | As of
|  | March 31, 2021 |  | December 31, 2020
|  | (in thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 38,574 |  | $ | 34,796
Billings in excess of costs and estimated earnings on |  |  |  |  |  |
uncompleted contracts (included in Other current liabilities) |  |  | (2,005) |  |  | (1,794)
|  | $ | 36,569 |  | $ | 33,002
As of March 31, 2021 and December 31, 2020, the eight largest customers comprised 99.5% and 99.4%, respectively, of the costs and estimated earnings in excess of billings on uncompleted contracts, net of billings in excess of costs and estimated earnings.

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