XML 32 R31.htm IDEA: XBRL DOCUMENT v3.3.0.814
Significant Accounting Policies - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Accounting Policies [Abstract]          
Realized investment gains or losses $ 0 $ 0 $ 0 $ 0  
Investments owned, at fair value     0    
Long-term debt, fair value $ 114,700,000   $ 114,700,000   $ 163,800,000
Property, Plant and Equipment [Line Items]          
Warrants exercise price $ 0.05   $ 0.05    
Software and software development costs          
Property, Plant and Equipment [Line Items]          
Property, plant and equipment, useful life     3 years