Intangible Assets - Additional Information (Detail) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2016 |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||
| Other direct cost of revenues | $ 453,000 | $ 437,000 | $ 430,000 | $ 409,000 | $ 1,217,000 | $ 451,000 | $ 454,000 | $ 453,000 | $ 1,416,000 | $ 1,731,000 | $ 7,477,000 |
| Amortization expense after year one | $ 0 | $ 0 | |||||||||
| X | ||||||||||
- Definition Finite-Lived Intangible Assets, Amortization Expense, After Year One No definition available.
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| X | ||||||||||
- Definition Amortization of property, plant and equipment directly related to goods produced and sold and services rendered by an entity during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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