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Income Taxes - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2016 | Sep. 30, 2015 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Income Taxes [Line Items] |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  | $ (70,000) | $ 421,000 | $ 504,000 | $ 493,000 |
Unrecognized Tax Benefits |  |  | $ 3,046,000 |  | $ 3,046,000 |  | $ 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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