Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net loss	$ (38,747)	$ (30,512)
Adjustments to reconcile net loss to net cash and cash equivalents used in operating activities:
Depreciation	1,720	1,585
Amortization of intangible assets	5,203	5,729
Amortization of discounts and premiums on investments, net	444	0
Stock-based compensation	4,328	3,628
Gain on extinguishment of debt	0	(2,847)
Deferred tax expense (benefit)	169	(36)
Bad debt expense	9	0
Change in inventory reserves	(567)	288
Property and equipment impairment	432	0
Loss on disposal of property and equipment	97	0
Change in fair value of warrant liabilities	(0)	1,981
Change in fair value of contingent consideration	(752)	735
Changes in operating assets and liabilities:
Accounts receivable	(8)	127
Inventories	(1,933)	(1,687)
Operating lease right-of-use assets	409	(2,970)
Prepaid expenses	189	517
Other current and long-term assets	(1,169)	2,660
Accounts payable	524	679
Accrued expenses	(284)	(1,428)
Deferred revenue	(4)	14
Operating lease liabilities	(290)	3,052
Net cash and cash equivalents used in operating activities	(30,230)	(18,485)
Investing Activities:
Purchase of available-for-sale investments	(17,792)	0
Proceeds from maturities of available-for-sale investments	41,408	0
Purchase of property and equipment	(443)	(700)
Net cash and cash equivalents provided by (used in) investing activities	23,173	(700)
Financing Activities:
Proceeds from issuance of common stock, net of issuance costs	0	130,314
Taxes paid related to net share settlement of vesting of restricted stock units	(349)	(1,041)
Proceeds from exercise of stock options and warrants	18	30,835
Net cash and cash equivalents (used in) provided by financing activities	(331)	160,108
Effect of exchange rate changes on cash and cash equivalents	239	(329)
Net (decrease) increase in cash, cash equivalents and restricted cash	(7,149)	140,594
Cash, cash equivalents and restricted cash, beginning of period	19,283	17,529
Cash, cash equivalents and restricted cash, end of period	12,134	158,123
Supplemental Disclosure for Cash Flow Information
Cash paid for leases	549	539
Cash paid for taxes	65	50
Supplemental Schedule of Non-cash Investing and Financing Activities:
Transfer of inventories to property and equipment	724	1,243
Acquisition of property and equipment in accounts payable	0	67
Reclass of warrant liability to common stock and additional paid-in-capital	0	2,236
Lease liabilities arising from obtaining right-of-use assets	$ 0	$ 3,461