Equity - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2009	Dec. 31, 2014	Jan. 22, 2009
Equity [Abstract]
Preferred stock, shares outstanding	0		0
Authorization for purchase of company's common stock				$ 10,000,000
Purchase common stock shares	0	349,800
Average cost of per share		$ 2.67
Purchase common stock value		$ 900,000