Note 15 - Stockholders' Equity (Details Textual) - USD ($)														1 Months Ended										3 Months Ended						9 Months Ended		12 Months Ended
	Aug. 25, 2023	Jul. 19, 2023	Jun. 01, 2023	May 25, 2023	Feb. 24, 2023	Sep. 02, 2022	Jun. 27, 2022	Jun. 21, 2022	Jun. 01, 2022	May 25, 2022	Mar. 25, 2022	Feb. 25, 2022	Jun. 01, 2021	Aug. 31, 2023	Jul. 31, 2023	May 31, 2023	Apr. 30, 2023	Feb. 28, 2023	Jan. 31, 2023	May 31, 2022	Apr. 30, 2022	Feb. 28, 2022	Jan. 31, 2022	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jul. 31, 2022
Proceeds from Issuance of Common Stock		$ 155,800,000				$ 85,000,000.0
Stock Issued During Period, Shares, New Issues		14,835,000				3,933,376
Shares Issued, Price Per Share		$ 10.50				$ 21.61
Stock Issued During Period, Shares, Warrants and Stock Options Exercised		220,896																													980,488
Stock Issued During Period, Shares, Warrant Exercises																														(150,295)	(968,448)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period																														11,834	12,000	12,000
Stock Issued During Period, Shares, Acquisitions							3,522,117	371,517			6,960,000
Common Stock, Dividends, Per Share, Declared (in dollars per share)																								$ 0.025	$ 0.025	$ 0.025	$ 0.025	$ 0.025	$ 0.025	$ 0.075	$ 0.075
Dividends Payable														$ 54,000		$ 53,000		$ 53,000		$ 53,000		$ 53,000		$ 7,000						$ 7,000			$ 53,000
Common Stock, Shares, Outstanding, Ending Balance (in shares)																								128,220,923						128,220,923		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 (in dollars per share)															$ 0.025		$ 0.025		$ 0.025		$ 0.025		$ 0.025							$ 0.025
Dividends	$ 3,200,000			$ 2,800,000	$ 2,800,000					$ 2,600,000		$ 2,400,000																		$ 2,700,000
Dividend Equivalent [Member]
Dividends														$ 333,000		282,000		283,000		214,000		214,000								$ 263,000,000,000
Dividends Payable																$ 5,000		$ 5,000		$ 2,000		$ 2,000
Share-Based Payment Arrangement, Nonemployee [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross									21,184
Share-Based Payment Arrangement, Employee [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross									600,000
Restricted Stock [Member] | Outside Directors [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			58,767						21,184				67,779																	58,767