Note B - Summary of Significant Accounting Policies - Remaining Performance Obligations 2 (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 1,226
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 327
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-03-31
Revenue, Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 296
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-03-30
Revenue, Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 183
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-03-28
Revenue, Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 92
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-03-27
Revenue, Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 61
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-03-26
Revenue, Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Amount	$ 267