| Computation of Basic and Diluted Net Earnings Per Share | The following table presents the computation of basic and diluted net earnings per share:   
|   |   | Three Months Ended June 30, |   |   | Nine Months Ended June 30, |   |  
|   |   | 2020 |   |   | 2019 |   |   | 2020 |   |   | 2019 |   |  
| Basic |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Net income |   | $ | 3,585 |   |   | $ | 1,480 |   |   | $ | 6,451 |   |   | $ | 3,484 |   |  
| Less: preferred stock dividends |   |   | — |   |   |   | — |   |   |   | — |   |   |   | — |   |  
| Net income applicable to common stock |   | $ | 3,585 |   |   | $ | 1,480 |   |   | $ | 6,451 |   |   | $ | 3,484 |   |  
|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Weighted average common shares outstanding |   |   | 1,646,836 |   |   |   | 1,886,445 |   |   |   | 1,735,416 |   |   |   | 1,919,221 |   |  
| Basic earnings per share |   | $ | 2.18 |   |   | $ | 0.78 |   |   | $ | 3.72 |   |   | $ | 1.81 |   |  
|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Diluted |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Net income applicable to common stock |   | $ | 3,585 |   |   | $ | 1,480 |   |   | $ | 6,451 |   |   | $ | 3,484 |   |  
| Add: preferred stock dividends |   |   | — |   |   |   | — |   |   |   | — |   |   |   | — |   |  
| Net income applicable for diluted earnings per share |   | $ | 3,585 |   |   | $ | 1,480 |   |   | $ | 6,451 |   |   | $ | 3,484 |   |  
|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Weighted average common shares outstanding |   |   | 1,646,836 |   |   |   | 1,886,445 |   |   |   | 1,735,416 |   |   |   | 1,919,221 |   |  
| Add: Options |   |   | — |   |   |   | — |   |   |   | — |   |   |   | 4,610 |   |  
| Add: Series B Preferred Stock |   |   | 1,071,220 |   |   |   | 1,071,220 |   |   |   | 1,071,220 |   |   |   | 1,071,220 |   |  
| Add: Series B Preferred Stock Warrants |   |   | 590,147 |   |   |   | 590,147 |   |   |   | 590,147 |   |   |   | 590,147 |   |  
| Add: Series E Preferred Stock |   |   | 47,840 |   |   |   | 77,840 |   |   |   | 47,840 |   |   |   | 77,840 |   |  
| Assumed weighted average common shares outstanding |   |   | 3,356,043 |   |   |   | 3,625,652 |   |   |   | 3,444,623 |   |   |   | 3,663,038 |   |  
| Diluted earnings per share |   | $ | 1.07 |   |   | $ | 0.41 |   |   | $ | 1.87 |   |   | $ | 0.95 |   |    |