Note 12 - Stock-Based Compensation - Vesting Schedule (Details)	12 Months Ended
	Dec. 31, 2023
Vesting, One year Then 2.083 Percent Monthly [Member] | Share-Based Payment Arrangement, Employee [Member] | Share-Based Payment Arrangement, Option [Member]
Vesting percent	25.00%
Vesting Monthly [Member] | Share-Based Payment Arrangement, Employee [Member] | Share-Based Payment Arrangement, Option [Member]
Vesting percent	2.083%
Vesting Monthly [Member] | Share-Based Payment Arrangement, Nonemployee [Member] | Share-Based Payment Arrangement, Option [Member]
Vesting percent	8.333%
Vesting Yearly [Member] | Share-Based Payment Arrangement, Employee [Member] | Restricted Stock Units (RSUs) [Member]
Vesting percent	50.00%