Note 3 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Assets, Fair Value Disclosure [Abstract]
Guaranteed investment certificates and term deposits classified as cash equivalents	$ 16,395
Total assets	16,395
Financial Liabilities Fair Value Disclosure [Abstract]
Derivative warrant liabilities	3,457
Total liabilities	3,457
Quoted prices in active markets (Level 1)
Assets, Fair Value Disclosure [Abstract]
Guaranteed investment certificates and term deposits classified as cash equivalents	16,395
Total assets	16,395
Financial Liabilities Fair Value Disclosure [Abstract]
Derivative warrant liabilities	0
Total liabilities	0
Significant other observable inputs (Level 2)
Assets, Fair Value Disclosure [Abstract]
Guaranteed investment certificates and term deposits classified as cash equivalents	0
Total assets	0
Financial Liabilities Fair Value Disclosure [Abstract]
Derivative warrant liabilities	0
Total liabilities	0
Significant unobservable inputs (Level 3)
Assets, Fair Value Disclosure [Abstract]
Guaranteed investment certificates and term deposits classified as cash equivalents	0
Total assets	0
Financial Liabilities Fair Value Disclosure [Abstract]
Derivative warrant liabilities	3,457
Total liabilities	$ 3,457