Note 12 - Subsequent Events (Details Textual) - USD ($)			1 Months Ended		2 Months Ended	6 Months Ended
	Jan. 03, 2023	Dec. 30, 2022	Jan. 31, 2023	Aug. 31, 2022	Feb. 28, 2023	Jun. 30, 2023	Dec. 31, 2022	Nov. 30, 2022
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)							2,523,521
Headquarters Office Building [Member]
Payments for Construction Payable				$ 1,300,000
Headquarters Office Building [Member] | Forecast [Member]
Accrual of Construction Payable						$ 700,000
Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		582,351					582,351
Subsequent Event [Member] | Headquarters Office Building [Member]
Payments for Construction Payable	$ 2,500,000		$ 2,500,000
Subsequent Event [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					3,216,805
Class of Warrant or Right, Issued During Period (in shares)					2,090,923
Unit Purchase Agreement in Private Placement Offering [Member]
Stock Offering, Maximum Value		$ 10,000,000.0						$ 9,200,000
Proceeds from Issuance or Sale of Equity, Total		5,000,000.0
Payments of Stock Issuance Costs		$ 700,200
Unit Purchase Agreement in Private Placement Offering [Member] | Subsequent Event [Member]
Proceeds from Issuance or Sale of Equity, Total					$ 5,000,000.0
Payments of Stock Issuance Costs					$ 4,200,000