Note 12 - Income Taxes - Government Assistance - Unrecognized Federal Tax Credits Expirations (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Tax Credit Carryforward, Amount	$ 3,922
2029
Tax Credit Carryforward, Amount	9
2030
Tax Credit Carryforward, Amount	23
2031
Tax Credit Carryforward, Amount	36
2032
Tax Credit Carryforward, Amount	345
2033
Tax Credit Carryforward, Amount	353
2034
Tax Credit Carryforward, Amount	348
2035
Tax Credit Carryforward, Amount	415
2036
Tax Credit Carryforward, Amount	229
2037
Tax Credit Carryforward, Amount	252
2038
Tax Credit Carryforward, Amount	259
2039
Tax Credit Carryforward, Amount	355
2040
Tax Credit Carryforward, Amount	226
2041
Tax Credit Carryforward, Amount	146
2042
Tax Credit Carryforward, Amount	312
2043
Tax Credit Carryforward, Amount	614
2044
Tax Credit Carryforward, Amount	$ 0