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Income Taxes - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2016 | Sep. 30, 2015 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Income Taxes [Line Items] |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  | $ 169,000 | $ 100,000 | $ 574,000 | $ 72,000 |
Income Tax Examination, Increase (Decrease) in Liability from Prior Year |  |  | 100,000 |  | 100,000 |  |
Income Tax Examination, Penalties and Interest Accrued |  |  | 100,000 |  | 100,000 |  |
Unrecognized Tax Benefits |  |  | $ 3,024,000 |  | $ 3,024,000 |  | $ 2,957,000
Subsidiary Revenue |  | $ 66,000,000 |  |  |  |  |
Reversal of Service Tax Refund | $ 160,000 |  |  |  |  |  |
Service Tax Credit Receivable | $ 1,000,000 |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Percentage for Subsidiary Service Tax |  | 15.00% |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |
Percentage for Subsidiary Service Tax |  | 12.36% |  |  |  |  |

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- Definition The amount the liability recorded for the income tax examination increased or decreased in the current year/accounting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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