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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | Revenue by Contract Type (In thousands)
|  | Three Months Ended |  |  | Three Months Ended |
|  | March 31, 2020 |  |  | March 31, 2019 |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Fixed price |  | $ | 9,563 |  |  | $ | 2,947 |  |  | $ | 12,510 |  |  | $ | 9,905 |  |  | $ | 428 |  |  | $ | 10,333 |
Time and materials |  |  | ― |  |  |  | 12,350 |  |  |  | 12,350 |  |  |  | ― |  |  |  | 1,375 |  |  |  | 1,375 |
Total |  | $ | 9,563 |  |  | $ | 15,297 |  |  | $ | 24,860 |  |  | $ | 9,905 |  |  | $ | 1,803 |  |  | $ | 11,708 |
Revenue by generator (In thousands)
|  | Three Months Ended |  |  | Three Months Ended |
|  | March 31, 2020 |  |  | March 31, 2019 |
|  | Treatment |  |  | Services |  |  | Total |  |  | Treatment |  |  | Services |  |  | Total |
Domestic government |  | $ | 7,690 |  |  | $ | 13,798 |  |  | $ | 21,488 |  |  | $ | 7,913 |  |  | $ | 686 |  |  | $ | 8,599 |
Domestic commercial |  |  | 1,873 |  |  |  | 462 |  |  |  | 2,335 |  |  |  | 1,879 |  |  |  | 758 |  |  |  | 2,637 |
Foreign government |  |  | ― |  |  |  | 1,014 |  |  |  | 1,014 |  |  |  | 57 |  |  |  | 337 |  |  |  | 394 |
Foreign commercial |  |  | ― |  |  |  | 23 |  |  |  | 23 |  |  |  | 56 |  |  |  | 22 |  |  |  | 78 |
Total |  | $ | 9,563 |  |  | $ | 15,297 |  |  | $ | 24,860 |  |  | $ | 9,905 |  |  | $ | 1,803 |  |  | $ | 11,708 |
Schedule of Contract Assets and Liabilities | The following table represents changes in our contract assets and contract liabilities balances:
(In thousands) |  | March 31, 2020 |  |  | December 31, 2019 |  |  | Year-to-date Change ($) |  |  | Year-to-date Change (%) |
Contract assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Account receivables, net of allowance |  | $ | 10,226 |  |  | $ | 13,178 |  |  | $ | (2,952 | ) |  |  | (22.4 | )%
Unbilled receivables - current |  |  | 10,188 |  |  |  | 7,984 |  |  |  | 2,204 |  |  |  | 27.6 | %
Contract liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | $ | 5,944 |  |  | $ | 5,456 |  |  | $ | 488 |  |  |  | 8.9 | %

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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=121604090&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=121604090&loc=SL49130545-203045 + Details
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