XML 83 R62.htm IDEA: XBRL DOCUMENT v3.8.0.1
Anti-dilutive Security not Included In Diluted per Share Calculations (Parenthetical) (Detail) - shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Preferred stock, shares outstanding 3,680 0
Conversion of preferred stock to common stock 3,346,332 293,796
Series A Preferred Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Preferred stock, shares outstanding 3,680  
Conversion of preferred stock to common stock 700,000