Acquisitions - Allocation of Purchase Price for Assets from Date of Acquisition (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Goodwill	$ 3,332	$ 3,332
Nexgen Wireless, Inc. [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Accounts receivable		5,358
Purchase price allocation, Prepaid and other assets		49
Purchase price allocation, Deferred cost of sales		24
Purchase price allocation, Fixed assets		43
Purchase price allocation, Assets		5,474
Purchase price allocation, Goodwill		3,332
Purchase price allocation, Total intangible assets		16,498
Purchase price allocation, Assets		21,972
Purchase price allocation, Accounts payable		200
Purchase price allocation, Accrued liabilities		341
Purchase price allocation, Liabilities		541
Purchase price allocation, Assets and Liabilities Assumed, Net		21,431
Nexgen Wireless, Inc. [Member] | Customer Relationships [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Intangible assets		8,117
Nexgen Wireless, Inc. [Member] | Trade Names [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Intangible assets		972
Nexgen Wireless, Inc. [Member] | Technology [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Intangible assets		3,332
Nexgen Wireless, Inc. [Member] | Backlog [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Intangible assets		162
Nexgen Wireless, Inc. [Member] | Non-Compete [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Purchase price allocation, Intangible assets		$ 583