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Note 9 - Stock Compensation Plans (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020	Dec. 12, 2022	Dec. 28, 2019	May 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 0	$ 0	$ 73
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)	0	0	10,000	0	20,000
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	216,254	50,615
Share-Based Payment Arrangement, Expense	$ 1,974	$ 902	$ 1,011
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 1,415	629
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	196,254
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	3 years
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Employee [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	33.33%
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Employee [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	33.33%
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Employee [Member] \| Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	33.33%
Restricted Stock Units (RSUs) [Member] \| Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	20,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			2 years
Restricted Stock Units (RSUs) [Member] \| Director [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	50.00%
Restricted Stock Units (RSUs) [Member] \| Director [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage	50.00%
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense	$ 0	$ 0	$ 5
Incentive Plan 2017 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized						1,661,598
Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture	3,886