Note 12 - Incentive Share Plan (Details Textual) - USD ($)										3 Months Ended		9 Months Ended		12 Months Ended			25 Months Ended
	Mar. 07, 2023	Dec. 31, 2022	Dec. 19, 2022	Mar. 28, 2022	Sep. 30, 2021	Jul. 31, 2021	Jun. 30, 2021	Jul. 31, 2020	Sep. 06, 2017	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 31, 2026	May 11, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			35,222									456,050			360,334	904,215
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 9.52									$ 9.14			$ 11.61	$ 5.99
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)												207,466			519,003	1,024,808
Share-Based Payment Arrangement, Expense										$ 1,083,000	$ 943,000	$ 2,712,000	$ 455,000
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)										1,103,000	855,000	927,000	705,000
Forecast [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)																	25 months
Share-Based Payment Arrangement, Expense														$ 3,700,000			$ 5,300,000
Market Based Vesting TSR Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)												27 months
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount										$ 3,100,000		$ 3,100,000
Market Based Vesting TSR Units [Member] | Issued 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Awarded Based on Ranking										100.00%		100.00%
Market Based Vesting TSR Units [Member] | Issued 2022 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Awarded Based on Ranking										150.00%		150.00%
Market Based Vesting TSR Units [Member] | Issued 2023 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Awarded Based on Ranking										100.00%		100.00%
Time-based Restricted Common Share Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)												33 months
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount										$ 3,100,000		$ 3,100,000
The 2018 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)																		3,433,831
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)		1,220,945								1,452,433		1,452,433			1,220,945
The 2018 Plan [Member] | Market Based Vesting TSR Units [Member] | Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	228,025			162,556			433,200	545,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 9.55			$ 13.74			$ 4.17	$ 5.55
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				3 years		3 years	3 years	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Options to be Converted to Cash (in shares)							111,465
The 2018 Plan [Member] | Market Based Vesting TSR Units [Member] | Share-Based Payment Arrangement, Employee [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Awarded Based on Ranking	0.00%			0.00%			0.00%	0.00%
The 2018 Plan [Member] | Market Based Vesting TSR Units [Member] | Share-Based Payment Arrangement, Employee [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Awarded Based on Ranking	200.00%			200.00%			200.00%	200.00%
The 2018 Plan [Member] | Time-based Restricted Common Share Units [Member] | Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	228,025			162,556	5,500		433,200	530,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 8.72	$ 5.83		$ 9.94	$ 9.06		$ 7.51
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)	3 years				3 years		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Awarded Based on Ranking		0.00%													0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)		273,500
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares)		0
The 2008 Plan [Member] | Performance-based Restricted Common Share Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage												100.00%
The 2008 Plan [Member] | Performance-based Restricted Common Share Units [Member] | Immediate Vesting Upon Change in Control [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									965,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)									$ 13.05
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)										455,000		455,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)												33 months
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)												0