Acquisition - Additional Information (Detail) - USD ($)	1 Months Ended
	Mar. 31, 2016	Aug. 31, 2016	Feb. 29, 2016
Business Acquisition [Line Items]
Goodwill		$ 70,163,000	$ 69,595,000
Sookasa, Inc.
Business Acquisition [Line Items]
Business acquisition, aggregate cash consideration to acquire Sookasa Inc.	$ 300,000
Business acquisition, issuance of common stock to acquire Sookasa Inc. (in shares)	10,000
Business acquisition, aggregate consideration transferred to acquire Sookasa Inc.	$ 400,000
Goodwill	400,000
Goodwill deductible for income tax purpose	$ 0