Note 4 - Intangible Assets - Amortization Expense (Details) $ in Thousands	Mar. 31, 2024 USD ($)
2025	$ 11
2026	22
2027	22
2028	12
Customer Relationships [Member]
2025	0
2026	0
2027	0
2028	0
Patents and Trademarks [Member]
2025	0
2026	0
2027	0
2028	0
Computer Software, Intangible Asset [Member]
2025	11
2026	22
2027	22
2028	$ 12

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant