Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information 3 (Detail)

v3.10.0.1
Common Stock - Additional Information 3 (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Anti-dilutive securities excluded from earning per share computation 3,400,000 0 3,400,000 0
Warrant [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Anti-dilutive securities excluded from earning per share computation 3,300,000 0 3,300,000 0
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Anti-dilutive securities excluded from earning per share computation 100,000 0 100,000 0
Restricted Stock Unit [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Anti-dilutive securities excluded from earning per share computation 20,394 0 20,394 0