Note 1 - Basis of Presentation and Significant Accounting Policies - Schedule of Stockholders' Equity Note, Warrants or Rights (Details)	Mar. 31, 2023 $ / shares shares
Warrants, outstanding (in shares) | shares	1,054,215
Warrants, exercise price (in dollars per share) | $ / shares	$ 2.24
Warrants, term (Year)	3 years 6 months
Warrants Issued in Connection With Capital Raise [Member]
Warrants, outstanding (in shares) | shares	952,215
Warrants, exercise price (in dollars per share) | $ / shares	$ 2.16
Warrants, term (Year)	3 years 6 months
Warrants Issued in Connection with Vendor Agreements [Member]
Warrants, outstanding (in shares) | shares	102,000
Warrants, exercise price (in dollars per share) | $ / shares	$ 3.06
Warrants, term (Year)	4 years 1 month 6 days