Loans and Allowance for Credit Losses - Schedule of Aging Analysis of Contractually Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Mar. 31, 2025
Financing Receivable, Past Due [Line Items]
Total	$ 430,308	$ 402,215
Loans Past Due 90 Days or More Still Accuring	310	102
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	732	677
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	528	354
Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	310	199
Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,570	1,230
Current
Financing Receivable, Past Due [Line Items]
Total	428,738	400,985
Commercial Real Estate Portfolio Segment \| Real Estate - Construction
Financing Receivable, Past Due [Line Items]
Total	25,062	15,069
Commercial Real Estate Portfolio Segment \| Real Estate - Construction \| Current
Financing Receivable, Past Due [Line Items]
Total	25,062	15,069
Commercial Real Estate Portfolio Segment \| Real Estate - Commercial
Financing Receivable, Past Due [Line Items]
Total	129,128	120,184
Commercial Real Estate Portfolio Segment \| Real Estate - Commercial \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0
Commercial Real Estate Portfolio Segment \| Real Estate - Commercial \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	0
Commercial Real Estate Portfolio Segment \| Real Estate - Commercial \| Current
Financing Receivable, Past Due [Line Items]
Total	129,128	120,184
Commercial Real Estate Portfolio Segment \| Real Estate - Residential
Financing Receivable, Past Due [Line Items]
Total	161,228	161,144
Loans Past Due 90 Days or More Still Accuring	126	3
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	649	486
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	284
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	126	87
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,059	573
Commercial Real Estate Portfolio Segment \| Real Estate - Residential \| Current
Financing Receivable, Past Due [Line Items]
Total	160,169	160,571
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate
Financing Receivable, Past Due [Line Items]
Total	44,834	32,007
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	6
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total		9
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	6	9
Commercial Non Real Estate Portfolio Segment \| Commercial - Non Real Estate \| Current
Financing Receivable, Past Due [Line Items]
Total	44,828	31,998
Agricultural Portfolio Segment \| Agricultural
Financing Receivable, Past Due [Line Items]
Total	44,520	42,835
Agricultural Portfolio Segment \| Agricultural \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total		79
Agricultural Portfolio Segment \| Agricultural \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total		79
Agricultural Portfolio Segment \| Agricultural \| Current
Financing Receivable, Past Due [Line Items]
Total	44,520	42,756
Consumer Portfolio Segment \| Other Consumer
Financing Receivable, Past Due [Line Items]
Total	11,381	14,649
Loans Past Due 90 Days or More Still Accuring	184	99
Consumer Portfolio Segment \| Other Consumer \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	77	112
Consumer Portfolio Segment \| Other Consumer \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	244	345
Consumer Portfolio Segment \| Other Consumer \| Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	184	112
Consumer Portfolio Segment \| Other Consumer \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total	505	569
Consumer Portfolio Segment \| Other Consumer \| Current
Financing Receivable, Past Due [Line Items]
Total	10,876	14,080
Land Development And SIDs Portfolio Segment \| Land Development and SIDs
Financing Receivable, Past Due [Line Items]
Total	14,155	16,327
Land Development And SIDs Portfolio Segment \| Land Development and SIDs \| Current
Financing Receivable, Past Due [Line Items]
Total	$ 14,155	$ 16,327