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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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