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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Jan. 04, 2019
Basis of Presentation and Significant Accounting Policies [Line Items]          
Capitalized internal and external development costs, gross     $ 533,000    
Weighted average grant date fair value of options granted (in usd per share)     $ 2.23    
Unrecognized non vested stock based compensation $ 275,000   $ 275,000    
Estimated forfeitures for unrecognized non vested stock based compensation 202,000   $ 202,000    
Expected weighted average life of forfeited cost     1 year 2 months 2 days    
Stock-based compensation     $ 219,000 $ 320,000  
Proceeds from exercise of common stock 0   0    
Tax benefits realized for tax deductions from option exercises $ 0   $ 0    
Expected shares issued (in shares) 200,000   200,000    
Shares available to issue (in shares) 39,514   39,514    
Shares issued in ESOP (in shares)         8,353
Stock-based compensation $ 1,000        
Employee Stock Option          
Basis of Presentation and Significant Accounting Policies [Line Items]          
Stock-based compensation $ 57,000 $ 72,000      
Maximum          
Basis of Presentation and Significant Accounting Policies [Line Items]          
Investment in sales-type lease, term 5 years   5 years    
Minimum          
Basis of Presentation and Significant Accounting Policies [Line Items]          
Investment in sales-type lease, term 3 years   3 years