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Related Party Transactions - Additional Information (Detail) - USD ($)
shares in Thousands
12 Months Ended
Jul. 31, 2017
Apr. 20, 2017
Dec. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]        
Payments for repurchase of common stock   $ 1,500,000 $ 1,511,000 $ 0
Proceeds from issuance of warrants   $ 2,200,000 2,200,000 0
Interest expense, related party     $ 1,400,000  
Number of company shares owned by related party (in shares)     419  
New Credit Agreement | Crystal Financial SPV LLC        
Related Party Transaction [Line Items]        
Outstanding borrowings     $ 21,500,000  
Digital Matrix Systems        
Related Party Transaction [Line Items]        
Payment of monthly installments for monitoring credit and on-line credit analysis services     2,500,000 1,700,000
Amount owed to related parties     178,000 162,000
Loeb Partners Corporation        
Related Party Transaction [Line Items]        
Advisory fees paid       553,000
One Health Group, LLC | Voyce Operations        
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 transaction with related party     123,000 $ 106,000
Due to related parties     $ 0