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v3.10.0.1

Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jul. 28, 2018 | Apr. 28, 2018
Assets |  |
Total assets | $ 56,762 | $ 59,354
Recurring basis |  |
Liabilities |  |
Transfers from Level 1 to Level 2 assets | 0 | 0
Transfers from Level 2 to Level 1 assets | 0 | 0
Transfers into Level 3 assets | 0 | 0
Transfers out of Level 3 assets | 0 | 0
Transfers into Level 3 liabilities | 0 | 0
Transfers out of Level 3 liabilities | 0 | 0
Level 1 | Recurring basis |  |
Assets |  |
Marketable securities | 1,180 | 1,141
Held-to-maturity investments | 3,038 | 3,340
Total assets | 4,218 | 4,481
Level 2 | Recurring basis |  |
Assets |  |
Marketable securities | 34,544 | 37,173
Total assets | 34,544 | 37,173
Level 3 | Recurring basis |  |
Assets |  |
Cost basis investments | 10,954 | 10,954
Total assets | 10,954 | 10,954
Liabilities |  |
Contingent consideration liability | $ 328 | $ 344

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