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Note 5 - Fair Value of Financial Instruments - Fair Value of Cash, Notes Receivable and Accounts Receivable (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Cash | $ 1,640 | $ 3,895
Notes receivable | 6,100 | 6,700
Fair Value, Inputs, Level 1 [Member] |  |
Cash | 1,640 | 3,895
Notes receivable | 0 | 0
Accounts receivable | 0 | 0
Company-owned life insurance policies | 393 | 248
Total cash and investments | 2,033 | 4,143
Fair Value, Inputs, Level 2 [Member] |  |
Cash | 0 | 0
Notes receivable | 6,149 | 6,672
Accounts receivable | 48,856 | 39,281
Company-owned life insurance policies | 0 | 0
Total cash and investments | 55,005 | 45,953
Fair Value, Inputs, Level 3 [Member] |  |
Cash | 0 | 0
Notes receivable | 0 | 0
Accounts receivable | 0 | 0
Company-owned life insurance policies | 0 | 0
Total cash and investments | 0 | 0
Reported Value Measurement [Member] |  |
Cash | 1,640 | 3,895
Notes receivable | 6,149 | 6,672
Accounts receivable | 48,856 | 39,281
Company-owned life insurance policies | 393 | 248
Total cash and investments | $ 57,038 | $ 50,096

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