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Note L - Stockholders' Equity, Stock Plans and Other Employee Benefit Plans (Details Textual)			12 Months Ended
	Jun. 12, 2024 $ / shares	Dec. 08, 2022 USD ($) shares	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 26, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Sep. 18, 2019 shares	Mar. 11, 2016 shares
Common Stock, Dividends, Per Share, Declared \| $ / shares			$ 2	$ 1.85
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross			10,000	0
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares			$ 78	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period			0	50,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares			$ 0	$ 67.59
Treasury Stock, Value, Acquired, Cost Method \| $				$ 1,892,000
Number of Times of Salary and Bonus Lump Sum Cash Payment			2.99
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			20.00%
Defined Contribution Plan, Employer Matching Contribution Rate Per Dollar \| $ / shares			$ 0.25
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay			3.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount \| $			$ 38,000	35,000
Multiemployer Plans, Withdrawal Obligation \| $					$ 378,000
Multiemployer Plan, Employer Contribution, Cost \| $			8,000	$ 9,000
Executive Chairman of the Board [Member]
Base Salary \| $			1,000,000
Term of Consulting Period Pursuant to the Lorber Employment [Agreement]		3 years
Executive Chairman of the Board [Member] \| Consulting Fee [Member]
Contractual Obligation \| $		$ 200,000
Chief Executive Officer [Member] \| Employment Contracts [Member]
Base Salary \| $			$ 625,000
Repurchase Program [Member]
Treasury Stock, Shares, Acquired				35,434
Shares Acquired, Average Cost Per Share \| $ / shares				$ 53.39
Treasury Stock, Value, Acquired, Cost Method \| $				$ 1,892
Sixth Stock Repurchase Plan [Member]
Treasury Stock, Shares, Acquired			1,101,884
Treasury Stock, Value, Acquired, Cost Method \| $			$ 39,000
Share Repurchase Program, Authorized, Number of Shares							1,200,000
Share Repurchase Program, Remaining Authorized, Number of Shares			98,116
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period			5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			4 years
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount \| $			$ 2,660,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			39 months
Share-Based Payment Arrangement, Option [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period			5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			3 years
Share-Based Payment Arrangement, Option [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period			10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			5 years
Restricted Stock [Member] \| Executive Chairman of the Board [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period		5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period		50,000
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period				5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period				5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period				50,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 67.59
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value \| $			$ 710,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period				10,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period				10,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period				10,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche Four [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period				10,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche Five [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period				10,000
The 2019 Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized						369,584
The 2019 Stock Incentive Plan [Member] \| Shares Expired or Forfeited up to 100000 Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant						11,000
The 2019 Stock Incentive Plan [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant			134,808
The 2019 Stock Incentive Plan [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant			148,584
The 2010 Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant						208,584
Forecast [Member]
Common Stock, Dividends, Per Share, Declared \| $ / shares	$ 0.5