Acquisitions - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 16, 2015	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 05, 2014
Business Acquisition Purchase Price Allocation Description	The purchase price for this acquisition was $2,424,000 cash paid at closing and the assumption of a liability of $20,000, and a maximum of an additional $3,000,000 earn-out.
Tangible assets	$ 1,606,000			$ 165,000	$ 5,435,000
Intangible assets	1,500,000			335,000	2,335,000
Goodwill	$ 2,338,000			170,000	$ 265,000
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, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total						$ 8,035,000
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, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High				1,100,000
Business Combination, Contingent Consideration, Liability, Current		$ 1,124,000	$ 1,124,000
Business Combination, Contingent Consideration, Liability, Noncurrent				864,000
Business Combination Earn Out Liability, Cash Paid			$ 334,000	445,000
Other Current Liabilities [Member]
Business Combination, Contingent Consideration, Liability, Current				864,000
Accrued Expenses And Other Current Liabilities [Member]
Business Combination, Contingent Consideration, Liability, Current				371,000
Other Income [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low				$ 300,000
Selling, General and Administrative Expenses [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ 594,000
Minimum [Member]
Intangible assets amotized period				2 years	2 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total				$ 4,400,000
Business Combination, Contingent Consideration, Liability				$ 800,000
Maximum [Member]
Intangible assets amotized period				10 years	10 years
Allocated Share Based Compensation Expense				$ 3,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total				5,400,000
Business Combination, Contingent Consideration, Liability				$ 2,000,000