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Carver Bancorp Inc.- Parent Company Only-Condensed Statements of Cash Flow (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 1994 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2003
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net loss |  | $ (4,401) | $ (847) |
Restricted stock vesting |  | 91 | 122 |
Increase (Decrease) in Other Assets |  | 480 | (1,301) |
Increase (Decrease) in Other Liabilities |  | (8,432) | 7,046 |
Net cash (used in) provided by operating activities |  | (10,513) | 7,152 |
Net cash used in investing activities |  | (15,262) | (79,079) |
Proceeds from Issuance of Long-term Debt |  | 25,000 | 2,500 | $ 13,000
Proceeds from Issuance of Common Stock | $ 21,500 | 0 | 2,998 |
Proceeds from Issuance of Preferred Stock |  | 0 | 4,000 |
Net cash provided by financing activities |  | 7,309 | 57,354 |
Net increase (decrease) in cash and cash equivalents |  | (18,466) | (14,573) |
Parent Company |  |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net loss |  | (4,401) | (847) |
Equity in net loss from subsidiaries |  | (2,640) | 706 |
Restricted stock vesting |  | 91 | 122 |
Increase in account receivable from subsidiaries |  | 0 | (205) |
Increase (Decrease) in Other Assets |  | (57) | 92 |
Increase (decrease) in accounts payable to subsidiaries |  | 976 | (1,212) |
Increase (Decrease) in Other Liabilities |  | (14) | (2,593) |
Net cash (used in) provided by operating activities |  | (765) | (4,939) |
Capital contribution |  | 0 | (15,500) |
Net cash used in investing activities |  | 0 | (15,500) |
Proceeds from Issuance of Long-term Debt |  | 0 | 2,500 |
Proceeds from Issuance of Common Stock |  | 0 | 2,998 |
Proceeds from Issuance of Preferred Stock |  | 0 | 4,000 |
Net cash provided by financing activities |  | 0 | 9,498 |
Net increase (decrease) in cash and cash equivalents |  | (765) | (10,941) |
Cash and cash equivalents - beginning |  | 1,433 | 12,374 |
Cash and cash equivalents - end |  | $ 668 | $ 1,433 |

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