Note 15 - Stockholders' Equity (Details Textual) - USD ($)								1 Months Ended								3 Months Ended				6 Months Ended		12 Months Ended
	May 25, 2023	Feb. 24, 2023	Jun. 27, 2022	Jun. 21, 2022	May 25, 2022	Mar. 25, 2022	Feb. 25, 2022	May 31, 2023	Apr. 30, 2023	Feb. 28, 2023	Jan. 31, 2023	May 31, 2022	Apr. 30, 2022	Feb. 28, 2022	Jan. 31, 2022	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Stock Issued During Period, Shares, Warrants and Stock Options Exercised																				162,129	977,588
Stock Issued During Period, Shares, Warrant Exercises																				(150,295)	(965,588)
Exercised (in shares)																				(11,834)	(12,000)	(12,000)
Stock Issued During Period, Shares, Acquisitions			3,522,117	371,517
Stock Issued During Period, Shares, Warrant Exercises (in shares)																				150,295	965,588
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)																				11,834	12,000	12,000
Common Stock, Dividends, Per Share, Declared																$ 0.025	$ 0.025	$ 0.025	$ 0.025	$ 0.05	$ 0.05
Dividends Payable								$ 53,000		$ 53,000		$ 53,000		$ 53,000
Common Stock, Shares, Outstanding, Ending Balance (in shares)																113,385,923				113,385,923		113,165,027
Class of Warrant or Right, Outstanding (in shares)																8,134,977				8,134,977		8,285,272
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)																$ 11.50				$ 11.50
Quarterly Dividend [Member]
Common Stock, Dividends, Per Share, Declared									$ 0.025		$ 0.025		$ 0.025		$ 0.025
Dividends	$ 2,800,000	$ 2,800,000			$ 2,600,000		$ 2,400,000
Dividend Equivalent [Member]
Dividends								282,000		283,000		214,000		214,000
Dividends Payable								$ 5,000		$ 5,000		$ 2,000		$ 2,000
Flat Top Operating Area [Member]
Stock Issued During Period, Shares, Acquisitions						6,960,000