General form of registration statement for all companies including face-amount certificate companies

Provision for Income Taxes - Additional Information (Detail)

v3.8.0.1
Provision for Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Taxes Disclosure [Line Items]    
Change in valuation allowance $ 6,616 $ 2,268
Minimum [Member]    
Income Taxes Disclosure [Line Items]    
Operating loss carry forward expiration date Jan. 01, 2034  
Federal [Member]    
Income Taxes Disclosure [Line Items]    
Operating loss carry forward $ 32,589 7,600
State [Member]    
Income Taxes Disclosure [Line Items]    
Operating loss carry forward $ 32,389 $ 7,600