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Related Party Transactions - Additional Information (Detail) - USD ($)
shares in Thousands
3 Months Ended
Jul. 31, 2017
Apr. 20, 2017
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Related Party Transaction [Line Items]          
Payments for repurchase of common stock   $ 1,500,000      
Proceeds from issuance of warrants   $ 2,200,000      
Interest expense, related party     $ 537,000    
Number of company shares owned by related party (in shares)     419    
New Credit Agreement | Crystal Financial S P V L L C          
Related Party Transaction [Line Items]          
Long-term line of credit     $ 21,500,000   $ 21,500,000
Digital Matrix Systems          
Related Party Transaction [Line Items]          
Payment of monthly installments for monitoring credit and on-line credit analysis services     696,000 $ 646,000  
Amount owed to related parties     127,000   $ 178,000
One Health Group, LLC | Voyce          
Related Party Transaction [Line Items]          
Proceeds from divestiture of businesses $ 100        
Revenue participation limit $ 20,000,000.0        
Monde of Events          
Related Party Transaction [Line Items]          
Amounts of related party transaction     10,000 $ 36,000  
Due to related parties     $ 0