Note 6 - Nil Coupon Non-redeemable Convertible Unsecured Loan Notes (Details Textual) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)
Share Price (in dollars per share) | $ / shares	$ 1.05
Unsecured Debt [Member] | NIL Coupon Non-redeemable Convertible Unsecured Loan Notes [Member]
Debt Instrument, Face Amount | $	$ 76	$ 0
Debt Instrument, Convertible, Number of Equity Instruments	6,715
Debt Instrument, Convertible, Carrying Amount of Equity Component | $	$ 7
Debt Instrument, Interest Rate, Stated Percentage		0.00%
Debt Instrument, Repurchase Amount | $	$ 0	$ 0
Unsecured Debt [Member] | NIL Coupon Non-redeemable Convertible Unsecured Loan Notes [Member] | Minimum [Member]
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares	$ 6.5
Unsecured Debt [Member] | NIL Coupon Non-redeemable Convertible Unsecured Loan Notes [Member] | Maximum [Member]
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares	$ 11.43