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Note 5 - Leases (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Aug. 28, 2022
USD ($)
Aug. 28, 2022
USD ($)
Dec. 31, 2018
USD ($)
a
ft²
Jun. 07, 2022
USD ($)
May 29, 2022
USD ($)
Operating Lease, Expense $ 16,000 $ 31,000      
Operating Lease, Payments   $ 27,000      
Operating Lease, Weighted Average Remaining Lease Term 7 years 3 months 18 days 7 years 3 months 18 days      
Sales Tax Exemption Bond, Maximum Amount       $ 18,500,000  
Additional Lease Agreement with City and County for Land at Newton, Kansas Airport [Member]          
Area of Land | a     3    
Lease Agreement with City and County for Land at Newton, Kansas Airport [Member]          
Area of Land | a     8    
Additional Manufacturing Facility [Member]          
Area of Land | ft²     90,000    
Construction in Progress Estimated Cost     $ 19,500,000    
Purchase Obligation, Total         $ 213,000
Construction in Progress, Gross         $ 19,202,000
Minimum [Member]          
Lessee, Operating Lease, Renewal Term (Year) 1 year 1 year      
Maximum [Member]          
Lessee, Operating Lease, Renewal Term (Year) 10 years 10 years