Quarterly report pursuant to Section 13 or 15(d)

Private Placement - Additional Information (Detail)

v3.8.0.1
Private Placement - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 9 Months Ended
Jun. 30, 2016
Sep. 30, 2016
Schedule of Capitalization, Equity [Line Items]    
Number of units in the transaction 8,188,804  
Per unit price of private placement $ 2.015  
Gross proceeds from private placement $ 16.5  
Net proceeds from private placement $ 15.3  
2016 PIPE [Member] | Common Stock [Member]    
Schedule of Capitalization, Equity [Line Items]    
Increase in number of shares   3,225,804
2016 PIPE [Member] | Convertible Series A Preferred Shares [Member]    
Schedule of Capitalization, Equity [Line Items]    
Increase in number of shares   4,963