Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (16,315)	$ (40,017)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	1,297	1,567
Amortization of intangible assets	50	160
Non-cash stock-based compensation expense	1,904	3,032
(Accretion of discounts) amortization of premiums on marketable securities, net	(527)	173
Amortization of debt issuance costs	104	378
Amortization of operating lease right-of-use assets	164	160
Goodwill impairment	0	12,026
Gain on sale of business, net	(1,207)	0
Change in fair value of warrant liability	(1,446)	0
Loss on disposal of property and equipment	38	0
Change in fair value of contingent consideration	200	7
Changes in operating assets and liabilities:
Accounts receivable	(11)	655
Inventory	(1,611)	(1,212)
Employer retention credit receivable	2,141	0
Prepaid expenses and other current assets	391	(3,487)
Other assets	75	120
Accounts payable	873	(2,641)
Accrued liabilities	(2,433)	1,532
Operating lease liabilities	(201)	(14)
Other long-term liabilities	(1)	(48)
Net cash used in operating activities	(16,515)	(27,609)
Cash flows from investing activities
Proceeds from sale of business	17,000	0
Purchases of available-for-sale marketable securities	(28,019)	0
Sales of available-for-sale marketable securities	0	2,500
Maturities of available-for-sale marketable securities	26,500	14,587
Purchases of property and equipment	(232)	(1,088)
Net cash provided by investing activities	15,249	15,999
Cash flows from financing activities
Proceeds from the exercise of stock options	4	66
Repurchase of common shares to pay employee withholding taxes	(217)	0
Proceeds from employee stock purchase plan	0	182
Payment of contingent consideration	0	(290)
Net cash used in financing activities	(213)	(42)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	8	(100)
Net change in cash, cash equivalents and restricted cash	(1,471)	(11,752)
Cash, cash equivalents and restricted cash, at the beginning of the period	31,348	24,221
Cash, cash equivalents and restricted cash, at the end of the period	29,877	12,469
Supplemental disclosure of cash flow information:
Cash paid for interest	1,207	1,025
Supplemental disclosure of noncash investing and financing activities:
Accounts receivable from sale of business	1,244	0
Change in unrealized (gain) loss on marketable securities	(12)	57
Change in unpaid purchases of property and equipment	(25)	(97)
Contingent consideration escrow release	$ 0	$ 17