Note 14 - Income Taxes - Net Operating Loss Carry Forwards and Tax Credit Carry Forwards Available to Offset Future Federal Income Tax (Details) $ in Thousands	Mar. 31, 2025 USD ($)
Operating Loss Carryforwards	$ 19,220
Research Tax Credit Carryforward [Member]
Research and Experimentation Tax Credits	20
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	17,982
Expiration Tax Year 2026 [Member]
Operating Loss Carryforwards	159
Expiration Tax Year 2026 [Member] \| Research Tax Credit Carryforward [Member]
Research and Experimentation Tax Credits	2
Expiration Tax Year 2026 [Member] \| State and Local Jurisdiction [Member]
Operating Loss Carryforwards	0
Expiration Tax Year 2027 [Member]
Operating Loss Carryforwards	2,665
Expiration Tax Year 2027 [Member] \| Research Tax Credit Carryforward [Member]
Research and Experimentation Tax Credits	0
Expiration Tax Year 2027 [Member] \| State and Local Jurisdiction [Member]
Operating Loss Carryforwards	0
ExpirationTax Year 2028 [Member]
Operating Loss Carryforwards	1,612
ExpirationTax Year 2028 [Member] \| Research Tax Credit Carryforward [Member]
Research and Experimentation Tax Credits	1
ExpirationTax Year 2028 [Member] \| State and Local Jurisdiction [Member]
Operating Loss Carryforwards	0
Expiration Tax Year After 2028 [Member]
Operating Loss Carryforwards	2,767
Expiration Tax Year After 2028 [Member] \| Research Tax Credit Carryforward [Member]
Research and Experimentation Tax Credits	17
Expiration Tax Year After 2028 [Member] \| State and Local Jurisdiction [Member]
Operating Loss Carryforwards	17,982
Indefinite [Member]
Operating Loss Carryforwards	12,017
Indefinite [Member] \| Research Tax Credit Carryforward [Member]
Research and Experimentation Tax Credits	0
Indefinite [Member] \| State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 0