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Note 4 - Leases - Maturities of Lease Liabilities (Details) - USD ($)
Apr. 02, 2023
Dec. 31, 2022
Next 12 months, operating leases $ 1,514,000  
12 to 24 months, operating leases 1,244,000  
24 to 36 months, operating leases 1,164,000  
36 to 48 months, operating leases 828,000  
48 to 60 months, operating leases 631,000  
Thereafter, operating leases 0  
Total lease payments, operating leases 5,381,000  
Less imputed interest, operating leases (787,000)  
Total, operating leases 4,594,000 $ 4,878,000
Finance Leases Excluding Equipment Financing Obligations [Member]    
Next 12 months, finance leases 1,429,000  
12 to 24 months, finance leases 1,339,000  
24 to 36 months, finance leases 1,183,000  
36 to 48 months, finance leases 130,000  
48 to 60 months, finance leases 0  
Thereafter, finance leases 0  
Total lease payments, finance leases 4,081,000  
Less imputed interest, finance leases (502,000)  
Total, finance leases $ 3,579,000