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Leases - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Dec. 28, 2018
Maturities of Operating Lease Liabilities
Remainder of 2019	$ 1,415
Years ending December 31,
2020	3,339
2021	3,436
2022	3,548
2023	3,646
Thereafter	16,066
Total lease payments	31,450
Less:
Present value adjustment	(5,106)
Tenant improvement reimbursements	(1,161)
Operating lease liabilities	$ 25,183	$ 14,837

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Amount of lessee's undiscounted obligation for lease payments for operating lease.

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-Publisher FASB
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