Note 11 - Loss Per Share - Antidilutive Securities Excluded from the Diluted Calculations (Details) - shares	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities (in shares) (in shares)	46,412	48,037
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities (in shares) (in shares)	0	2,500
Warrant [Member]
Antidilutive Securities (in shares) (in shares)	1,729,304	1,812,379
Series B Convertible Preferred Stock [Member]
Antidilutive Securities (in shares) (in shares)	16	16