| In millions, except per share items | Mar-31-18 | Mar-31-17 | Mar-31-16 | Mar-31-15 | Mar-31-14 | Mar-31-13 | Mar-31-12 | Mar-31-11 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A | 10-K | S-1/A |
| Assets | | | | | | | | |
| Cash and due from banks | 15.5 | 24.4 | 47.1 | 10.8 | 3.5 | 3.5 | 4.3 | |
| Federal funds sold | 7.9 | 4.9 | 20.3 | 5.9 | | | | |
| Cash and cash equivalents | 23.4 | 29.4 | 67.4 | 120.4 | 33.1 | 34.0 | 35.2 | |
| Certificates of deposit held as investment | 0.5 | 0.5 | 4.0 | | | | | |
| Federal Home Loan Bank stock, at cost | 3.1 | 2.0 | 1.0 | 0.5 | 0.3 | 0.4 | 0.5 | |
| Loans | 390.4 | 677.9 | 444.6 | 160.3 | 186.2 | 197.5 | 204.5 | |
| Allowance for loan losses | -2.8 | -2.2 | -1.7 | -1.7 | 1.8 | 2.1 | 3.6 | |
| Net loans and leases | 387.6 | 1,012.5 | 663.1 | 158.6 | 142.9 | 159.1 | 169.9 | |
| Premises and equipment, net | 3.9 | 3.7 | 3.6 | 2.0 | 2.1 | 2.5 | 2.5 | |
| Foreclosed real estate | 0.5 | 0.5 | 0.4 | | 0.7 | 0.8 | 0.8 | |
| Accrued interest receivable | 1.5 | 1.3 | 0.9 | 0.8 | 0.8 | 0.9 | 0.9 | |
| Bank-owned life insurance | 17.5 | 18.3 | 12.7 | 12.4 | 12.0 | 11.6 | 8.3 | |
| Income taxes refundable | 0.0 | | 0.2 | | 0.7 | 1.2 | | |
| Goodwill and other intangible assets | 9.2 | 9.3 | 7.4 | 2.8 | 2.8 | 2.9 | 2.9 | |
| Other assets | 3.0 | 1.9 | 1.5 | 1.4 | 1.5 | 1.4 | 1.2 | |
| Total Assets | 525.5 | 514.5 | 392.9 | 291.0 | 302.8 | 332.0 | 318.5 | |
| |
| Liabilities | | | | | | | | |
| Noninterest-bearing deposits | 29.6 | 30.4 | 19.7 | 16.7 | 15.3 | 11.5 | 11.8 | |
| Interest-bearing deposits | 375.6 | 382.5 | 594.9 | 441.5 | 495.6 | 805.8 | 891.1 | |
| Total deposits | 405.1 | 412.9 | 928.7 | 680.5 | 749.7 | 1,077.5 | 1,183.9 | |
| Borrowings | 60.7 | 36.1 | 14.8 | | | | | |
| Advances by borrowers for taxes and insurance | 2.0 | 1.9 | 1.1 | 0.6 | 0.7 | 0.8 | 0.9 | |
| Other liabilities | 3.7 | 3.9 | 1.5 | 1.3 | 1.5 | 3.6 | 1.2 | |
| Total liabilities | 471.5 | 454.7 | 331.4 | 230.2 | 241.0 | 264.5 | 283.4 | |
| |
| Commitments and contingencies | | | | | | | | |
| Shareholders' Equity | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | |
| Additional paid in capital | 32.1 | 31.7 | 31.2 | 30.8 | 32.9 | 35.6 | | |
| Retained earnings | 25.9 | 31.7 | 32.7 | 32.8 | 33.1 | 34.3 | 34.4 | |
| Unearned ESOP shares | -2.1 | -2.2 | -2.4 | -2.5 | -2.7 | -2.8 | | |
| Accumulated other comprehensive loss | -1.9 | -1.4 | 0.0 | -0.3 | -1.6 | 0.4 | 0.6 | |
| Total shareholders' equity | 54.1 | 59.8 | 61.5 | 60.8 | 61.8 | 67.4 | 35.1 | |
| Total Liabilities and Shareholders' Equity | 525.5 | 514.5 | 392.9 | 291.0 | 302.8 | 332.0 | 318.5 | |