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v3.10.0.1

Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 26, 2019 | Apr. 28, 2018
Assets |  |
Total assets | $ 57,669 | $ 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 from Level 1 to Level 2 liabilities | 0 | 0
Transfers from Level 2 to Level 1 liabilities | 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
Recurring basis | Level 1 |  |
Assets |  |
Marketable securities | 163 | 1,141
Held-to-maturity investments | 3,384 | 3,340
Total assets | 3,547 | 4,481
Recurring basis | Level 2 |  |
Assets |  |
Marketable securities | 34,852 | 37,173
Total assets | 34,852 | 37,173
Recurring basis | Level 3 |  |
Assets |  |
Cost basis investments | 11,979 | 10,954
Total assets | 11,979 | 10,954
Liabilities |  |
Contingent consideration liability | $ 7,500 | $ 344

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