| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Interest income: | | | | | | | | |
| Loans, including fees | 26.7 | 25.8 | 24.0 | 23.0 | 22.9 | 19.8 | 18.5 | 18.7 |
| Investment securities | 1.7 | 1.6 | 1.6 | 1.5 | | 1.2 | 1.1 | |
| Fed funds sold and interest-bearing balances in banks | 2.6 | | | 0.8 | | | | |
| FHLB dividends | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 |
| FRB dividends | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Total interest and dividend income | 31.3 | 29.5 | 27.1 | 25.6 | 24.8 | 21.4 | 20.0 | 20.0 |
| |
| Interest expense: | | | | | | | | |
| Deposits | 5.9 | 2.0 | 1.4 | 1.5 | 1.5 | 1.2 | 1.2 | 1.2 |
| Subordinated debt | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Junior subordinated deferrable interest debentures | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Total interest expense | 7.0 | 3.0 | 2.4 | 2.5 | 2.5 | 2.2 | 2.2 | 2.2 |
| Net interest income | 24.3 | 26.5 | 24.7 | 23.2 | 22.4 | 19.2 | 17.7 | 17.8 |
| (Reversal of) provision for credit losses | -1.3 | 0.6 | 1.2 | 2.6 | 0.0 | 0.5 | 0.5 | -0.5 |
| Net interest income after (reversal of) provision for credit losses | 25.5 | 25.9 | 23.5 | 20.5 | 22.3 | 18.7 | 17.3 | 18.3 |
| |
| Noninterest income: | | | | | | | | |
| Gain on sale of loans | 0.1 | 0.0 | 1.3 | 0.3 | 1.1 | 1.1 | 2.2 | 1.0 |
| Loss on equity securities | -0.9 | | | -1.8 | | | | |
| |
| Service charges and other fees | | | | | | | | |
| Loan servicing and other loan fees | 0.6 | 0.5 | 0.5 | 0.6 | 0.6 | 0.4 | 0.5 | 0.4 |
| Income on investment in Small Business Investment Company ("SBIC") fund | 0.2 | | | 0.0 | | | | |
| Bargain purchase gain | | | | | 1.7 | | | |
| Other income and fees | 0.2 | 0.3 | 0.2 | 0.4 | 0.2 | 0.2 | 0.2 | 0.2 |
| Total noninterest income | 1.1 | 1.5 | 2.7 | 0.5 | 4.4 | 2.6 | 4.0 | 2.5 |
| |
| Noninterest expense: | | | | | | | | |
| Salaries and employee benefits | 10.7 | 10.7 | 10.2 | 9.3 | 10.3 | 8.6 | 8.2 | 8.1 |
| Occupancy and equipment | 2.0 | 2.0 | 2.0 | 1.9 | 2.4 | 1.8 | 1.9 | 1.9 |
| Data processing | 1.6 | 1.5 | 1.6 | 1.7 | 2.3 | 1.3 | 1.5 | 1.3 |
| Other expense | 2.2 | 2.1 | 2.3 | 2.3 | 3.3 | 2.0 | 2.3 | 2.2 |
| Total noninterest expense | 16.6 | 16.3 | 16.1 | 15.2 | 18.3 | 13.8 | 13.9 | 13.4 |
| Income before provision for income taxes | 10.1 | 11.1 | 10.2 | 5.5 | 8.4 | 7.5 | 7.4 | 7.3 |
| Provision for income taxes | 2.9 | 3.0 | 3.0 | 1.6 | 1.9 | 2.1 | 2.0 | 2.0 |
| Net income | 7.2 | 8.1 | 7.2 | 3.9 | 6.5 | 5.4 | 5.4 | 5.3 |
| |
| Earnings per common share: | | | | | | | | |
| Basic earnings per common share (in dollars per share) | $0.59 | $0.62 | $0.54 | $0.29 | $0.51 | $0.51 | $0.51 | $0.49 |
| |
| Weighted average common shares outstanding (in shares) | 12.2 | 13.1 | 13.3 | 13.6 | 12.6 | 10.9 | 10.7 | 10.9 |
| Diluted earnings per common share (in dollars per share) | $0.59 | $0.62 | $0.54 | $0.29 | $0.51 | $0.51 | $0.51 | $0.49 |
| Weighted average common shares outstanding (in shares) | 12.2 | 13.1 | 13.3 | 13.6 | 12.6 | 10.9 | 10.7 | 10.9 |