Note 11 - Long-term Debt - Net Carrying Amount of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Aug. 31, 2026	May 31, 2026
Total non-current portion of long-term debt	$ 118,046	$ 120,425
Term Loan Due in February 2028 [Member]
Carrying amount of long-term debt	32,400	34,310
Carrying amount of long-term debt	32,400	34,310
Term Loan Due in July 2033 [Member]
Carrying amount of long-term debt	8,068	8,420
Carrying amount of long-term debt	8,068	8,420
Term Loan Due in July 2033 Two [Member]
Carrying amount of long-term debt	9,923	10,356
Carrying amount of long-term debt	9,923	10,356
Term Loan Due in August 2026 [Member]
Carrying amount of long-term debt	0	23
Carrying amount of long-term debt	0	23
Mortgage Payable Due in August 2026 [Member]
Carrying amount of long-term debt	1,831	1,890
Carrying amount of long-term debt	1,831	1,890
Term Loan Due in August 2028 [Member]
Carrying amount of long-term debt	1,599	1,822
Carrying amount of long-term debt	1,599	1,822
Mortgage Payable Due in October 2030 [Member]
Carrying amount of long-term debt	18,480	18,669
Carrying amount of long-term debt	18,480	18,669
Term Loan Due in June 2028 [Member]
Carrying amount of long-term debt	62,000	63,688
Carrying amount of long-term debt	62,000	63,688
Long-term Debt, Excluding Convertible Debentures [Member]
Carrying amount of long-term debt	134,301	139,178
Carrying amount of long-term debt	134,301	139,178
Unamortized financing fees	(798)	(593)
Net carrying amount	133,503	138,585
Less principal portion included in current liabilities	$ (15,457)	$ (18,160)

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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