| Computation of Basic and Diluted Net Earnings Per Share | The following table presents the computation of basic and diluted net earnings per share (in 000's):   
       
        |  |  |  |  |  |  |  |  |  |  
        |   |   | Three Months Ended December 31, |   |  
        |   |   | 2021 |   |   | 2020 |   |  
        | Basic |   |   |   |   |   |   |  
        | Net income |   | $ | 6,546 |   |   | $ | 5,413 |   |  
        | Less: preferred stock dividends |   |   | — |   |   |   | — |   |  
        | Net income applicable to common stock |   | $ | 6,546 |   |   | $ | 5,413 |   |  
        |    |   |   |   |   |   |   |  
        | Weighted average common shares outstanding |   |   | 1,582,334 |   |   |   | 1,568,213 |   |  
        | Basic earnings per share |   | $ | 4.14 |   |   | $ | 3.45 |   |  
        |    |   |   |   |   |   |   |  
        | Diluted |   |   |   |   |   |   |  
        | Net income applicable to common stock |   | $ | 6,546 |   |   | $ | 5,413 |   |  
        | Add: preferred stock dividends |   |   | — |   |   |   | — |   |  
        | Net income applicable for diluted earnings per share |   | $ | 6,546 |   |   | $ | 5,413 |   |  
        |    |   |   |   |   |   |   |  
        | Weighted average common shares outstanding |   |   | 1,582,334 |   |   |   | 1,568,213 |   |  
        | Add: Options |   |   | 40,534 |   |   |   | 41,668 |   |  
        | Add: Series B Preferred Stock |   |   | 1,578,950 |   |   |   | 1,071,220 |   |  
        | Add: Series B Preferred Stock Warrants |   |   | — |   |   |   | 590,147 |   |  
        | Add: Series E Preferred Stock |   |   | 239 |   |   |   | 47,840 |   |  
        | Assumed weighted average common shares outstanding |   |   | 3,202,057 |   |   |   | 3,319,088 |   |  
        | Diluted earnings per share |   | $ | 2.04 |   |   | $ | 1.63 |   |  |