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v3.21.1

Revenue (Tables) | 3 Months Ended
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Mar. 31, 2021
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following tables present further disaggregation of our revenues by different categories for our Services and Treatment Segments:
Revenue by Contract Type |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Three Months Ended |  |  | Three Months Ended |
|  | March 31, 2021 |  |  | March 31, 2020 |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Fixed price |  | $ | 7,495 |  |  | $ | 2,581 |  |  | $ | 10,076 |  |  | $ | 9,563 |  |  | $ | 1,392 |  |  | $ | 10,955 |
Time and materials |  |  | — |  |  |  | 13,057 |  |  |  | 13,057 |  |  |  | — |  |  |  | 13,905 |  |  |  | 13,905 |
Total |  | $ | 7,495 |  |  | $ | 15,638 |  |  | $ | 23,133 |  |  | $ | 9,563 |  |  | $ | 15,297 |  |  | $ | 24,860 |
Revenue by generator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Three Months Ended |  |  | Three Months Ended |
|  | March 31, 2021 |  |  | March 31, 2020 |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Domestic government |  | $ | 4,598 |  |  | $ | 12,661 |  |  | $ | 17,259 |  |  | $ | 7,690 |  |  | $ | 13,798 |  |  | $ | 21,488 |
Domestic commercial |  |  | 2,265 |  |  |  | 590 |  |  |  | 2,855 |  |  |  | 1,873 |  |  |  | 462 |  |  |  | 2,335 |
Foreign government |  |  | 534 |  |  |  | 2,364 |  |  |  | 2,898 |  |  |  | — |  |  |  | 1,014 |  |  |  | 1,014 |
Foreign commercial |  |  | 98 |  |  |  | 23 |  |  |  | 121 |  |  |  | — |  |  |  | 23 |  |  |  | 23 |
Total |  | $ | 7,495 |  |  | $ | 15,638 |  |  | $ | 23,133 |  |  | $ | 9,563 |  |  | $ | 15,297 |  |  | $ | 24,860 |
Schedule of Contract Assets and Liabilities | The following table represents changes in our contract assets and contract liabilities balances:
|  |  |  |  |  |  |  | Year-to-date |  |  | Year-to-date |
(In thousands) |  | March 31, 2021 |  |  | December 31, 2020 |  |  | Change ($) |  |  | Change (%) |
Contract assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Account receivables, net of allowance |  | $ | 20,121 |  |  | $ | 9,659 |  |  | $ | 10,462 |  |  |  | 108.3 | %
Unbilled receivables - current |  |  | 9,229 |  |  |  | 14,453 |  |  |  | (5,224 | ) |  |  | (36.1 | )%
Contract liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | $ | 3,106 |  |  | $ | 4,614 |  |  | $ | (1,508 | ) |  |  | (32.7 | )%

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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