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Summary of Significant Accounting Policies and Related Data (Details Textual) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 26, 2019 USD ($) shares | Jun. 02, 2018 USD ($) | Dec. 01, 2018 business | Feb. 29, 2020 USD ($) | Mar. 02, 2019 USD ($) business shares | Mar. 03, 2018 USD ($) shares | Mar. 04, 2017 USD ($) shares | Jun. 01, 2019 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Fiscal time period |  |  |  |  | P52W | P52W | P53W |
Fixed-price contracts, number of businesses | business |  |  |  |  | 3 |  |  |
Fixed-price contracts, percentage of total revenue |  |  | 34.00% |  |  |  |  |
Number of business which changed revenue recognition practices due to adoption | business |  |  | 1 |  |  |  |  |
Number of businesses | business |  |  |  |  | 1 |  |  |
Percentage of total revenue |  |  |  |  | 22.00% |  |  |
Research and development expense |  |  |  |  | $ 19,500 | $ 14,000 | $ 8,600 |
Share repurchases, shares | shares |  |  |  |  | 1,258,000 | 702,000 | 250,000 |
Retained earnings |  |  |  |  | $ 367,597 | $ 373,259 |  |
Income tax effects |  |  |  |  |  | 0 |  |
Net periodic benefit cost |  |  |  |  | 692 | 718 | $ 739 |
Scenario, Forecast |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Net periodic benefit cost |  |  |  | $ 500 |  |  |  |
ASU 2017-07 |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Net periodic benefit cost |  |  |  |  | 500 |  |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | ASU 2014-09 |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Retained earnings |  |  |  |  | 3,000 |  |  |
Cost of Sales |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Research and development expense |  |  |  |  | 6,500 | 1,500 | 2,200 |
Selling, general and administrative expenses |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Advertising expense |  |  |  |  | $ 1,500 | $ 1,400 | $ 1,100 |
Subsequent Event |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Share repurchases, shares | shares | 437,671 |  |  |  |  |  |  |
Share repurchases, value | $ 16,200 |  |  |  |  |  |  |
Subsequent Event | ASU 2016-02 | Scenario, Forecast |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Right-of-use asset |  |  |  |  |  |  |  | $ 50,000
Lease liability |  |  |  |  |  |  |  | $ 50,000
Minimum |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Performance Period For Percentage Of Completion Contracts |  |  |  |  | 12 months |  |  |
Maximum |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Performance Period For Percentage Of Completion Contracts |  |  |  |  | 18 months |  |  |
Recognized at shipment |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Percentage of total revenue |  |  |  |  | 44.00% |  |  |
Accumulated Other Comprehensive (Loss) Income |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Share repurchases, value |  |  |  |  | $ 0 |  |  |
Income tax effects |  |  |  |  | $ 737 |  |  |
Accumulated Other Comprehensive (Loss) Income | New Accounting Pronouncement, Early Adoption, Effect | ASU 2018-02 |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Income tax effects |  | $ (700) |  |  |  |  |  |

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