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Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Feb. 28, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 28,726 |  |  | $ 15,621
Intangibles net | 12,859 |  |  | $ 8,458
Payments of business, net of cash acquired | 18,974 | $ 0 |  |
SubCon [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  | 100.00% |
Goodwill | 7,000 |  |  |
Intangibles net | 4,800 |  |  |
MICOS Telecom [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill | 6,200 |  |  |
SubCon and MICOS Telcom [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill | 13,200 |  |  |
Intangibles net | 4,800 |  |  |
Payments of business, net of cash acquired | 19,000 |  |  |
Net working capital | $ 4,200 |  |  |

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