Note 15 - Stockholders' Equity (Details Textual) - USD ($)											1 Months Ended						3 Months Ended				9 Months Ended		12 Months Ended
	Nov. 23, 2022	Nov. 03, 2022	Sep. 02, 2022	Aug. 25, 2022	Jun. 27, 2022	Jun. 21, 2022	Jun. 01, 2022	May 25, 2022	Mar. 25, 2022	Feb. 25, 2022	Aug. 31, 2022	Jul. 31, 2022	May 31, 2022	Apr. 30, 2022	Feb. 28, 2022	Jan. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Nov. 30, 2023	Nov. 30, 2022
Stock Issued During Period, Shares, Acquisitions (in shares)					3,522,117	371,517
Proceeds from Issuance of Common Stock			$ 85,000,000.0
Stock Issued During Period, Shares, New Issues (in shares)			3,933,376
Shares Issued, Price Per Share (in dollars per share)			$ 21.61
Stock Issued During Period, Shares, Warrants and Stock Options Exercised (in shares)																					980,448
Stock Issued During Period, Shares, Warrant Exercises (in shares)																					965,588
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)																					12,000		154,268
Dividends declared, per share (in dollars per share)																	$ 0.025	$ 0.025	$ 0.025	$ 0.125	$ 0.075	$ 0.125
Dividends, Total								$ 2,600,000		$ 2,400,000
Common Stock, Shares, Outstanding, Ending Balance (in shares)																	113,162,827				113,162,827		96,774,185
Class of Warrant or Right, Outstanding (in shares)																	8,287,472				8,287,472		9,500,166
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)																	$ 11.50				$ 11.50
Forecast [Member]
Dividends, Total	$ 2,800,000	$ 280,000
Dividends Payable		$ 7,000																						$ 53,000	$ 53,000
Quarterly Dividend [Member]
Dividends declared, per share (in dollars per share)												$ 0.025		$ 0.025		$ 0.025
Dividends, Total				$ 2,700,000
Dividend Equivalent [Member]
Dividends, Total											$ 263,000		$ 214,000		$ 214,000
Dividends Payable											$ 7,000		$ 36,000		$ 36,000
Share-Based Payment Arrangement, Nonemployee [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)							21,184
Share-Based Payment Arrangement, Employee [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)							600,000
Flat Top Operating Area [Member]
Stock Issued During Period, Shares, Acquisitions (in shares)									6,960,000												10,853,634