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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | In general, the Company’s business segmentation is aligned according to the nature and economic characteristics of our services and provides meaningful disaggregation of each business segment’s results of operations. The nature of the Company’s performance obligations within our Treatment and Services Segments result in the recognition of our revenue primarily over time. The following tables present further disaggregation of our revenues by different categories for our Services and Treatment Segments: Schedule of Disaggregation of Revenue
Revenue by Contract Type |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Three Months Ended |  |  | Three Months Ended |
|  | June 30, 2021 |  |  | June 30, 2020 |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Fixed price |  | $ | 7,706 |  |  | $ | 1,482 |  |  | $ | 9,188 |  |  | $ | 7,840 |  |  | $ | 2,329 |  |  | $ | 10,169 |
Time and materials |  |  | — |  |  |  | 6,957 |  |  |  | 6,957 |  |  |  | — |  |  |  | 11,878 |  |  |  | 11,878 |
Total |  | $ | 7,706 |  |  | $ | 8,439 |  |  | $ | 16,145 |  |  | $ | 7,840 |  |  | $ | 14,207 |  |  | $ | 22,047 |
Revenue by Contract Type |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Six Months Ended |  |  |  |  |  | Six Months Ended |  |  |  |
|  | June 30, 2021 |  |  |  |  |  | June 30, 2020 |  |  |  |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Fixed price |  | $ | 15,201 |  |  | $ | 4,063 |  |  | $ | 19,264 |  |  | $ | 17,403 |  |  | $ | 3,721 |  |  | $ | 21,124 |
Time and materials |  |  | — |  |  |  | 20,014 |  |  |  | 20,014 |  |  |  | — |  |  |  | 25,783 |  |  |  | 25,783 |
Total |  | $ | 15,201 |  |  | $ | 24,077 |  |  | $ | 39,278 |  |  | $ | 17,403 |  |  | $ | 29,504 |  |  | $ | 46,907 |
Revenue by generator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Three Months Ended |  |  |  |  |  | Three Months Ended |  |  |  |
|  | June 30, 2021 |  |  |  |  |  | June 30, 2020 |  |  |  |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Domestic government |  | $ | 5,639 |  |  | $ | 6,764 |  |  | $ | 12,403 |  |  | $ | 6,055 |  |  | $ | 12,791 |  |  | $ | 18,846 |
Domestic commercial |  |  | 2,060 |  |  |  | 391 |  |  |  | 2,451 |  |  |  | 1,785 |  |  |  | 431 |  |  |  | 2,216 |
Foreign government |  |  | 7 |  |  |  | 1,261 |  |  |  | 1,268 |  |  |  | — |  |  |  | 965 |  |  |  | 965 |
Foreign commercial |  |  | — |  |  |  | 23 |  |  |  | 23 |  |  |  | — |  |  |  | 20 |  |  |  | 20 |
Total |  | $ | 7,706 |  |  | $ | 8,439 |  |  | $ | 16,145 |  |  | $ | 7,840 |  |  | $ | 14,207 |  |  | $ | 22,047 |
Revenue by generator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Six Months Ended |  |  | Six Months Ended |
|  | June 30, 2021 |  |  | June 30, 2020 |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Domestic government |  | $ | 10,237 |  |  | $ | 19,425 |  |  | $ | 29,662 |  |  | $ | 13,745 |  |  | $ | 26,589 |  |  | $ | 40,334 |
Domestic commercial |  |  | 4,328 |  |  |  | 981 |  |  |  | 5,309 |  |  |  | 3,658 |  |  |  | 893 |  |  |  | 4,551 |
Foreign government |  |  | 541 |  |  |  | 3,625 |  |  |  | 4,166 |  |  |  | — |  |  |  | 1,979 |  |  |  | 1,979 |
Foreign commercial |  |  | 95 |  |  |  | 46 |  |  |  | 141 |  |  |  | — |  |  |  | 43 |  |  |  | 43 |
Total |  | $ | 15,201 |  |  | $ | 24,077 |  |  | $ | 39,278 |  |  | $ | 17,403 |  |  | $ | 29,504 |  |  | $ | 46,907 |
Schedule of Contract Assets and Liabilities | The following table represents changes in our contract assets and contract liabilities balances: Schedule of Contract Assets and Liabilities
|  | June 30, |  |  | December 31, |  |  | Year-to-date |  |  | Year-to-date |
(In thousands) |  | 2021 |  |  | 2020 |  |  | Change ($) |  |  | Change (%) |
Contract assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Account receivables, net of allowance |  | $ | 9,244 |  |  | $ | 9,659 |  |  | $ | (415 | ) |  |  | (4.3 | )%
Unbilled receivables - current |  |  | 7,332 |  |  |  | 14,453 |  |  |  | (7,121 | ) |  |  | (49.3 | )%
Contract liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | $ | 3,932 |  |  | $ | 4,614 |  |  | $ | (682 | ) |  |  | (14.8 | )%

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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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