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Restricted Assets	12 Months Ended
Restricted Assets	Sep. 30, 2021
Cash and Cash Equivalents [Abstract]
Restricted Assets	Note 3 - Restricted Assets Federal Reserve regulations require that the Bank maintain certain minimum reserve balances on hand or on deposit with the FRB, based on a percentage of transaction account deposits. In response to the COVID-19 pandemic, the Federal Reserve reduced the reserve requirement ratio to zero percent, effective March 26, 2020. Currently, the FRB has not announced plans to re-impose a reserve requirement, however, the FRB may adjust reserve requirement ratios in its sole discretion.