Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information (Detail)

v3.3.0.814
Common Stock - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 03, 2015
Mar. 16, 2015
Sep. 30, 2015
Sep. 30, 2015
Dec. 31, 2014
Class of Stock [Line Items]          
Warrants, exercised on a net issuances basis       185,585 210,000
Griffin Securities Inc. [Member]          
Class of Stock [Line Items]          
Warrants, exercised on a net issuances basis 185,585        
Shares of common stock issued upon exercise of warrants 98,592        
Non-employee Directors [Member] | 2012 Equity Incentive Plan [Member] | Restricted Stock [Member]          
Class of Stock [Line Items]          
Restricted shares awarded   40,000      
Restricted shares vest in each quarter end     10,000 30,000  
Unrecognized compensation expense       $ 66,000