CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020
Operating activities
Net income (loss)	$ (12,630)	$ 300
Adjustments to reconcile net income (loss) to net cash and cash equivalents provided by operating activities:
Depreciation and amortization	1,686	1,797
Net amortization (accretion) of investment premiums and discounts	62	(26)
Equity-based compensation	1,987	1,328
Straight-line rent adjustment and amortization of lease incentives	(231)	(142)
Deferred income taxes	(202)	426
Changes in operating assets and liabilities	12,692	(148)
Total adjustments	15,994	3,235
Net cash and cash equivalents provided by operating activities	3,364	3,535
Investing activities
Purchases of investments	(10,163)	(12,213)
Proceeds from sales and maturities of investments	9,815	14,510
Purchases of leasehold improvements and equipment	(365)	(1,837)
Net cash and cash equivalents provided by (used in) investing activities	(713)	460
Financing activities
Net proceeds from issuance of common stock	1,436	994
Common stock repurchases	0	(393)
Taxes paid related to net share settlement	(532)	(345)
Net cash and cash equivalents provided by financing activities	904	256
Effect of exchange rate changes on cash and cash equivalents	(40)	(74)
Net increase in cash, cash equivalents and restricted cash	3,515	4,177
Cash, cash equivalents and restricted cash at beginning of period	30,128	20,554
Cash, cash equivalents and restricted cash at end of period	33,643	24,731
Non-cash investing and financing activity
Additions to right-of-use-assets obtained from new operating lease liabilities	$ 0	$ 128