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Commitments and Contingencies - Purchase Commitments (Details)
$ in Thousands
Jan. 27, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Conditional purchase commitment $ 350
Purchase Obligation, Fiscal Year Maturity  
2018 665
2019 2,675
2020 1,898
2021 313
2022 143
Thereafter 380
Total $ 6,074