Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023
Investments		$ 3,776,000	$ 4,062,000
Share-Based Payment Arrangement, Expense		$ 1,308,000	$ 150,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		0	0
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense		$ 1,308,000	$ 150,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period		486,846
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount		$ 4,508,000
The 2020 Non-employee Director Stock Option Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period		10,800	6,021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	[1],[2],[3]	10,800	6,021
General and Administrative Expense [Member]
Depreciation		$ 3,566,000	$ 6,256,000
General and Administrative Expense [Member] | Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense		385,000	150,000
Computer Software, Intangible Asset [Member]
Amortization of Intangible Assets		$ 0	0
Computer Software, Intangible Asset [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life		3 years
Computer Software, Intangible Asset [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life		7 years
Customer Relationships [Member]
Amortization of Intangible Assets		$ 34,000	133,000
Customer Relationships [Member] | Other Long-term Assets [Member]
Finite-Lived Intangible Assets, Net		$ 0	$ 34,000

[1] ⁵ The 2020 Non-Employee Directors’ Stock Incentive Plan (the “2020 Plan”) was approved by shareholders in August 2020, which replaces the 2011 Director Plan and authorizes the issuance of 200,000 shares of common stock to non-employee directors. We expect to grant each independent director $50,000 of stock on the date of each subsequent Annual Meeting.

[2] Indicates plans with stock grants.

[3] Indicates plans with stock options.