Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 03, 2018	Mar. 04, 2017
Cash equivalents
Total cash equivalents	$ 3,301	$ 9,923
Long-term securities
Total assets at fair value	12,354	19,512
Money market funds
Cash equivalents
Total cash equivalents	2,901	4,423
Commercial paper
Cash equivalents
Total cash equivalents	400	5,500
Municipal bonds
Available for sale securities
Total available for sale securities	423	548
Long-term securities
Total long-term securities	8,630	9,041
Quoted Prices in Active Markets (Level 1)
Cash equivalents
Total cash equivalents	2,901	4,423
Long-term securities
Total assets at fair value	2,901	4,423
Quoted Prices in Active Markets (Level 1) | Money market funds
Cash equivalents
Total cash equivalents	2,901	4,423
Quoted Prices in Active Markets (Level 1) | Commercial paper
Cash equivalents
Total cash equivalents	0	0
Quoted Prices in Active Markets (Level 1) | Municipal bonds
Available for sale securities
Total available for sale securities	0	0
Long-term securities
Total long-term securities	0	0
Other Observable Inputs (Level 2)
Cash equivalents
Total cash equivalents	400	5,500
Long-term securities
Total assets at fair value	9,453	15,089
Other Observable Inputs (Level 2) | Money market funds
Cash equivalents
Total cash equivalents	0	0
Other Observable Inputs (Level 2) | Commercial paper
Cash equivalents
Total cash equivalents	400	5,500
Other Observable Inputs (Level 2) | Municipal bonds
Available for sale securities
Total available for sale securities	423	548
Long-term securities
Total long-term securities	$ 8,630	$ 9,041