Annual report pursuant to Section 13 and 15(d)

Note 16 - Subsequent Events (Details Textual)

Note 16 - Subsequent Events (Details Textual)	Dec. 05, 2023 USD ($)	Nov. 22, 2023 USD ($)	Oct. 06, 2023 USD ($)	Jun. 02, 2022	Dec. 28, 2023 USD ($)	Sep. 30, 2023 USD ($)	Feb. 03, 2023 USD ($)	Nov. 19, 2019 USD ($)	Oct. 08, 2018 USD ($)
Amended Credit Agreement [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 170,000,000		$ 170,000,000	$ 145,000,000
Debt Covenant Fixed Charge Coverage Ratio Term (Month)				12 months
Line of Credit Facility, Minimum Available Threshold One							$ 7,500,000
Line of Credit Facility, Minimum Available Threshold Two							9,000,000
Line of Credit Facility, Minimum Available Threshold Three							10,000,000
Line of Credit Facility, Minimum Available Threshold Four							$ 0
Subsequent Event [Member] \| Sale Leaseback of Fayetteville Campus [Member]
Sale Leaseback Transaction, Net Book Value		$ 25,000,000
Sale Leaseback Transaction, Lease Term (Year)		10 years
Subsequent Event [Member] \| Sales Leaseback of Clinton Property [Member]
Sale Leaseback Transaction, Net Book Value		$ 6,500,000
Sale Leaseback Transaction, Lease Term (Year)		6 years
Sale Leaseback Transaction, Net Proceeds, Financing Activities		$ 6,000,000
Subsequent Event [Member] \| Amended Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Covenant, Percentage of Borrowing Rate or Commitment, Availability for Stock Repurchase or Dividends			17.50%
Line of Credit Facility, Maximum Borrowing Capacity	$ 150,000,000		$ 25,000,000
Fixed Charge Coverage Ratio	1		1		1
Line of Credit Facility, Current Borrowing Capacity	$ 17,500,000
Debt Covenant Fixed Charge Coverage Ratio Term (Month)	12 years
Line of Credit Facility, Minimum Available Threshold One					$ 7,500,000
Line of Credit Facility, Minimum Available Threshold Two					9,000,000
Line of Credit Facility, Minimum Available Threshold Three					7,000,000
Line of Credit Facility, Minimum Available Threshold Four					8,500,000
Line of Credit Facility, Minimum Available Threshold Five					10,000,000
Debt Instrument, Covenant, Availability Requirement					$ 17,500,000