Stock Options and Warrants - Series A, B, and C Warrants Price Adjustment - Additional Information (Detail) |
Oct. 14, 2014
$ / shares
|
---|---|
Securities Purchase Agreement [Member] | Series H Preferred Stock [Member] | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Convertible preferred stock, conversion price | $ 6.72 |