Financial Instruments (Details 3) - USD ($) $ in Thousands	Nov. 30, 2019	Mar. 02, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 2,680	$ 2,015
Commercial paper	500	300
Municipal and corporate bonds	12,384	12,432
Foreign currency forward/option contract	69	470
Interest rate swap contract	16
Quoted Prices in Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	2,680	2,015
Commercial paper	0	0
Municipal and corporate bonds	0	0
Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Commercial paper	500	300
Municipal and corporate bonds	12,384	12,432
Foreign currency forward/option contract	69	$ 470
Interest rate swap contract	$ 16