Note 16 - Subsequent Events (Details Textual)					1 Months Ended							2 Months Ended	3 Months Ended			9 Months Ended	12 Months Ended
	Aug. 31, 2022 USD ($)	May 04, 2022 USD ($) shares	Feb. 25, 2022 USD ($)	Jul. 01, 2021 $ / shares	Nov. 30, 2023 USD ($)	Nov. 30, 2022 USD ($)	Aug. 31, 2022 USD ($)	May 31, 2022 USD ($)	May 04, 2022 USD ($) shares	Apr. 30, 2022 USD ($) a $ / shares shares	Feb. 28, 2022 USD ($)	May 16, 2022 USD ($) shares	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 shares	Nov. 30, 2021 USD ($)
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares														$ 0.025
Dividends, Total			$ 2,400,000								$ 214,000
Dividends Payable														$ 53,000				$ 53,000
Proceeds from Warrant Exercises														$ 779,000	$ 5,466,000
Class of Warrant or Right, Outstanding (in shares) | shares														9,422,741			9,500,166
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares																	442,500
Share-Based Payment Arrangement, Expense														$ 3,976,000	$ 966,000
Forecast [Member]
Dividends, Total	$ 31,000				$ 2,000	$ 2,000	$ 31,000	$ 214,000
Share-Based Payment Arrangement, Expense													$ 9,700,000			$ 10,200,000
Quarterly Dividend [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares				$ 0.025
Subsequent Event [Member]
Proceeds from Warrant Exercises									$ 6,900,000
Class of Warrant or Right, Exercised During Period (in shares) | shares									602,669
Stock Issued During Period, Shares, Exercise of Warrants (in shares) | shares									602,669
Stock Issued During Period, Shares, Cashless Exercise of Warrants (in shares) | shares												290,465
Class of Warrant or Right, Exercised During Period, Cashless (in shares) | shares												526,300
Class of Warrant or Right, Outstanding (in shares) | shares												8,293,772
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares		824,500
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 10,900,000							$ 10,900,000
Subsequent Event [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares		729,833
Subsequent Event [Member] | Share-Based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		2 years
Subsequent Event [Member] | Pilot Exploration Inc. [Member]
Supply Commitment, Minimum Barrels of Produced Water												29,200,000
Supply Commitment, Amount Committed												$ 6,000,000.0
Subsequent Event [Member] | Quarterly Dividend [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares										$ 0.025
Dividends, Total										$ 2,600,000
Subsequent Event [Member] | Hannathon Petroleum, LLC Property [Member]
Area of Land (Acre) | a										18,600
Asset Acquisition, Percent of Interests Acquired										60.00%
Payments to Acquire Oil and Gas Property and Equipment, Total										$ 255,000,000.0
Asset Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares										3,800,000