XML 64 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1
Nature of Operations and Basis of Presentation - Additional Information (Detail)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Apr. 30, 2016
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2017
State
Equity [Line Items]      
Number of states | State     16
Number of common stock, shares issued | shares   584,000  
Total consideration for issuance of common stock   $ 10,000  
Private Placement [Member] | RenaissanceRe Ventures Ltd [Member]      
Equity [Line Items]      
Number of common stock, shares issued | shares 583,771    
Common stock, price per share | $ / shares $ 17.13    
Total consideration for issuance of common stock $ 10,000    
Represents the non-cash portion for cancellation of outstanding indebtedness, including accrued interest 7,035    
Cash proceeds from private placement $ 2,965