Note 8 - Stock Incentive Plan (Details Textual) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
		Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Stock Awards [Member]
Share-Based Payment Arrangement, Expense	[1]					$ 581,000	$ 811,000
Stock Awards [Member] | Awards granted in 2022 [Member]
Share-Based Payment Arrangement, Expense							$ 600,000
Minimum [Member]
Decline of Book Value Per Share		15.00%	15.00%	10.00%	10.00%
The 2021 Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum						10.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)				1,473,324		1,473,324

[1] The awards issued during the year ended December 31, 2022 were granted with respect to service performed in 2021. Approximately $600,000 of compensation expense related to the 2022 awards was accrued and recognized in 2021.