• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Stockholders' Equity (Preferred Stock) - Additional Information (Detail) - shares
12 Months Ended
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Subsequent Event [Line Items]      
Preferred shares issued 0   0
Preferred shares outstanding 0   0
Additional shares of preferred stock authorized to issue, no par value 18,100,000    
Series B Preferred Stock [Member]      
Subsequent Event [Line Items]      
Preferred shares issued 0   0
Preferred shares outstanding 0   0
Series A Cumulative Convertible Preferred Stock [Member]      
Subsequent Event [Line Items]      
Preferred shares issued 0   0
Preferred shares outstanding   0 0