Commitments and Contingencies - Future Minimum Payments for Manufacture and Supply Commitments (Details) $ in Thousands	Dec. 30, 2017 USD ($)
Future minimum payments for manufacturing and supply commitments
2018	$ 5,736
2019	6,709
Total contract manufacturing and supply commitments	$ 12,445

Amount of contractual obligation due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant