Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities:
Net loss	$ (22,218)	$ (19,128)
Adjustments to reconcile net loss to net cash and cash equivalents used in operating activities:
Depreciation	813	869
Amortization of intangible assets	112	2,670
Amortization of discounts and premiums on investments, net	(89)	215
Stock-based compensation	1,916	2,245
Deferred tax expense	91	84
Bad debt expense	0	177
Change in inventory reserves	(374)	(180)
Change in fair value of contingent consideration	105	(154)
Changes in operating assets and liabilities:
Accounts receivable	1,607	25
Inventories	203	(1,440)
Operating lease right-of-use assets	187	197
Prepaid expenses	250	201
Other current and long-term assets	(27)	(487)
Accounts payable	1,608	74
Accrued employee compensation and benefits	(1,120)	(1,043)
Accrued expenses and other current liabilities	(93)	(107)
Deferred revenue	(13)	(1)
Operating lease liabilities	(206)	(160)
Net cash and cash equivalents used in operating activities	(17,248)	(15,943)
Investing Activities:
Purchase of available-for-sale investments	(2,949)	(5,967)
Proceeds from maturities of available-for-sale investments	32,750	29,258
Purchase of property and equipment	(64)	(246)
Net cash and cash equivalents provided by investing activities	29,737	23,045
Financing Activities:
Taxes paid related to net share settlement of vesting of restricted stock units	(488)	(348)
Proceeds from exercise of stock options and warrants	5	12
Net cash and cash equivalents used in financing activities	(483)	(336)
Effect of exchange rate changes on cash and cash equivalents	403	(45)
Net increase in cash, cash equivalents and restricted cash	12,409	6,721
Cash, cash equivalents and restricted cash, beginning of period	7,470	19,283
Cash, cash equivalents and restricted cash, end of period	19,879	26,004
Supplemental Disclosure for Cash Flow Information
Cash paid for leases	330	300
Cash paid for taxes	190	29
Supplemental Schedule of Non-cash Investing and Financing Activities:
Transfer of inventories to property and equipment	112	160
Lease liabilities arising from obtaining right-of-use assets	$ 45	$ 0