| Note 5. Other Comprehensive Loss   Changes in components of other comprehensive loss and taxes related to items of other comprehensive income (loss) are as follows:   
|  |  | Three Months Ended March 31, 2022 |  |  
| (In thousands) |  | Before Tax |  |  | Tax Effect |  |  | Net of Tax Amount |  |  
| Unrealized losses on available-for-sale securities |  | $ | (932 | ) |  | $ | (207 | ) |  | $ | (725 | ) |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Other comprehensive loss |  | $ | (932 | ) |  | $ | (207 | ) |  | $ | (725 | ) |      
|  |  | Six Months Ended March 31, 2022 |  |  
| (In thousands) |  | Before Tax |  |  | Tax Effect |  |  | Net of Tax Amount |  |  
| Unrealized losses on available-for-sale securities |  | $ | (932 | ) |  | $ | (207 | ) |  | $ | (725 | ) |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Other comprehensive loss |  | $ | (932 | ) |  | $ | (207 | ) |  | $ | (725 | ) |    At  March 31, 2022 components of accumulated other comprehensive loss is as follows:   
| (In thousands) |  | Available-for-Sale Securities |  |  | Accumulated Other Comprehensive Loss |  |  
| Balances at September 30, 2021 |  | $ | - |  |  | $ | - |  |  
| Other comprehensive loss for the six months ended March 31, 2022 |  |  | (725 | ) |  |  | (725 | ) |  
| Balances at March 31, 2022 |  | $ | (725 | ) |  | $ | (725 | ) |  |