Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Summary of Outstanding Warrants (Detail)

v3.7.0.1
Common Stock - Summary of Outstanding Warrants (Detail)
 6 Months Ended
Jun. 30, 2017
$ / shares
shares
Series A Warrants [Member]  
Class of Warrant or Right [Line Items]  
Total Outstanding and Exercisable | shares 2,779,933
Exercise price per Share | $ / shares $ 4.00
Expiration Date 2019-07
Series B Warrants [Member]  
Class of Warrant or Right [Line Items]  
Total Outstanding and Exercisable | shares 670,269
Exercise price per Share | $ / shares $ 4.00
Expiration Date 2019-07
Series A-1 Warrants [Member]  
Class of Warrant or Right [Line Items]  
Total Outstanding and Exercisable | shares 239,234
Exercise price per Share | $ / shares $ 2.40
Expiration Date 2020-10