Subsequent Event - Additional Information (Detail) (Familiar, Inc. [Member], Subsequent Event [Member], USD $) In Millions, except Share data, unless otherwise specified	Oct. 07, 2013
Familiar, Inc. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business acquisition, acquire in cash	$ 1.3
Business acquisition, acquire in shares of common stock	107,749
Business acquisition, value for shares issued	$ 1.4
Business acquisition, value for per shares	$ 13.33