Summary of Company's Nonvested Options (Detail)	6 Months Ended
	Jun. 30, 2016 $ / shares shares
Summary Of Company Nonvested Options [Line Items]
Non-vested, Options, beginning of period | shares	1,149,850
Granted, Options | shares	0
Vested, Options | shares	0
Forfeited, Options | shares	1,149,850
Non-vested, Options, end of period | shares	0
Non-vested, Weighted Average Grant Date Fair Value, beginning of period | $ / shares	$ 0.9
Granted, Weighted Average Grant Date Fair Value | $ / shares	0
Vested, Weighted Average Grant Date Fair Value | $ / shares	0
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	0.88
Non-vested, Weighted Average Grant Date Fair Value, end of period | $ / shares	$ 0