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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Sep. 01, 2019
Jan. 01, 2019
Dec. 31, 2017
Significant Accounting Policies [Line Items]                
Allowance for doubtful accounts receivable       $ 767,464 $ 929,339     $ 699,102
Impairment of goodwill $ 0 $ 0 $ 0          
Bank cash balances on deposit exceeded federally insured limits       $ 3,188,540        
Tax benefit percentage of being realized upon ultimate settlement       50.00%        
Advertising expense       $ 20,364 38,570      
Operating lease right-of-use asset       1,595,044        
Operating lease liability       1,764,479        
Accumulated deficit       $ (99,229,393) $ (99,174,153)      
ASU 2016-02 [Member]                
Significant Accounting Policies [Line Items]                
Operating lease right-of-use asset             $ 2,000,000  
Operating lease liability             2,200,000  
Accumulated deficit             $ 0  
Deferred Stock Units [Member]                
Significant Accounting Policies [Line Items]                
Number of stock unit received           1    
Deferred stock units       14,451