Net Loss Per Share - Computation of Denominators Used in Net Loss Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic:
Weighted average common shares outstanding	22,828,612	22,608,324	22,818,601	19,150,412
Diluted:
Weighted average common shares outstanding - Basic	22,828,612	22,608,324	22,818,601	19,150,412
Common stock options	0	0	0	0
Common stock warrants	0	0	0	0
Convertible preferred stock	0	0	0	0
Denominator for diluted net loss per share	22,828,612	22,608,324	22,818,601	19,150,412