Acquisitions - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2015	Jan. 16, 2015
Tangible assets			$ 1,600,000
Intangible assets			1,600,000
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
Minimum [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total		4,400,000
Maximum [Member]
Allocated Share Based Compensation Expense	$ 3,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total		$ 5,400,000