Note 11 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($)	May 02, 2023	Apr. 20, 2023
Warrants Issued in April 20, 2023 Private Placement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		1,562,883
Class of Warrant or Right, Purchase Price of Warrants or Rights (in dollars per share)		$ 0.835
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 0.71
Class of Warrant or Right, Term (Year)		7 years
Warrants Issued to Rafael Holdings [Member] | Rafael Holdings, Inc. [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	2,514,970
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.71
Class of Warrant or Right, Term (Year)	7 years
Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)		1,562,883
Proceeds from Issuance or Sale of Equity		$ 1,305,000
Private Placement [Member] | Rafael Holdings, Inc. [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,514,970
Proceeds from Issuance or Sale of Equity	$ 2,100,000