Acquisitions - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Jan. 31, 2017 USD ($)	Jan. 16, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 05, 2014 USD ($)
Number Of Employees		3
Business Acquisition Purchase Price Allocation Description		The purchase price for this acquisition was $2.4 million cash paid at closing and the assumption of a liability of $20,000, and a maximum of an additional $3.0 million of deferred acquisition cost, or earn-out.
Tangible assets		$ 1,600,000
Intangible assets		1,500,000
Goodwill		$ 2,300,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				$ 3,000,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability				1,000,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Goodwill				1,900,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles				800,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory				100,000
Business Combination Earnout Liability, cash paid			$ 1,700,000	400,000
Subsequent Event [Member]
Business Combination Earnout Liability, cash paid	$ 800,000
Accrued Expenses and Other Current Liabilities [Member]
Business Combination, Contingent Consideration, Liability, Noncurrent				1,900,000
Other Income (Expense) [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low				300,000
Other Noncash Expense			$ 600,000
Minimum [Member]
Intangible assets amotized period			2 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total				4,400,000
Maximum [Member]
Intangible assets amotized period			10 years
Allocated Share Based Compensation Expense			$ 3,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total				5,400,000
Polar Technologies [Member]
Tangible assets				200,000	$ 5,400,000
Intangible assets				300,000	2,300,000
Goodwill				$ 200,000	$ 300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total						$ 8,000,000
Polar Technologies [Member] | Minimum [Member]
Intangible assets amotized period					2 years
Polar Technologies [Member] | Maximum [Member]
Intangible assets amotized period					10 years