XML 54 R43.htm IDEA: XBRL DOCUMENT v3.7.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
May 03, 2017
Mar. 31, 2017
Subsequent Event [Line Items]    
Net proceeds from issuance of common stock   $ 29,535
Cowen    
Subsequent Event [Line Items]    
Net proceeds from issuance of common stock   $ 29,500
Issuance of common stock   6,697,568
Cowen | Subsequent Event    
Subsequent Event [Line Items]    
Net proceeds from issuance of common stock $ 18,900  
Issuance of common stock 3,345,552