Note 6 - Common Stock and Convertible Preferred Stock (Details Textual)		12 Months Ended
	Dec. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Nov. 30, 2022 USD ($)	Nov. 30, 2021 shares	Oct. 31, 2021 shares
Common Stock, Shares Authorized (in shares)		300,000,000	300,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Common Stock, Voting Rights, Vote Per Share		1
Dividends, Common Stock, Total | $		$ 0
Proceeds from Issuance of Common Stock | $		$ 0	$ 8,382,826
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,523,521
Dividends Payable | $		$ 0
Preferred Stock, Shares Issued (in shares)		0	0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)		0	0
Nonemployees [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 2.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					148,480	183,100
Warrants in Connection With Unit Purchase Agreement [Member]
Number of Warrant Per Unit (in shares)	1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	0.5
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 2.00
Warrants and Rights Outstanding, Term (Year)	5 years
Placement Agent Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 1.30
Warrants and Rights Outstanding, Term (Year)	5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	582,351	582,351
Purchaser Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		1,941,170
Private Placement Offering [Member]
Sale of Stock, Number of Shares Issued in Transaction (in shares)			33,147,192
Sale of Stock, Price Per Share (in dollars per share) | $ / shares			$ 2.00
Proceeds from Issuance of Common Stock | $			$ 11,500,000
Payments of Stock Issuance Costs | $			$ 2,100,000
Unit Purchase Agreement in Private Placement Offering [Member]
Payments of Stock Issuance Costs | $	$ 700,200
Stock Offering, Maximum Value | $	$ 10,000,000.0			$ 9,200,000
Stock Issued During the Period, Units, New Issues (in shares)	3,882,340
Number of Common Stock Per Unit (in shares)	1
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 1.30
Proceeds from Issuance or Sale of Equity, Total | $	$ 5,000,000.0
Placement Agents Fee | $	$ 504,704
Percent of Gross Proceeds From Issuance of Equity	10.00%