Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (31,410)	$ (18,363)
Adjustments to reconcile net loss to net cash, cash equivalents, and restricted cash used in operating activities
Depreciation and amortization	1,806	1,523
Amortization of lease right-of-use assets	728
Loss on extinguishment of liabilities	2,952	728
Stock‑based compensation expense	2,714	2,291
Change in contingent consideration		1,622
Provision for doubtful accounts	(39)	193
Accrued interest, amortization of debt issuance costs and other	2,174	502
Inventory excess and obsolescence	535
Impairment loss on intangible assets	81
Changes in operating assets and liabilities:
Accounts receivable	(1,757)	9,830
Other current assets	690	1,794
Other long-term assets	933	447
Accounts payable and other accrued liabilities	(1,195)	(9,453)
Deferred revenue	(392)	(1,350)
Current and long-term operating lease liabilities	(513)
Net cash, cash equivalents, and restricted cash used in operating activities	(22,693)	(10,236)
Cash flows from investing activities
Purchases of property and equipment	(591)	(747)
Patent costs and intangible asset acquisition, net	(141)	(117)
Net cash, cash equivalents, and restricted cash used in investing activities	(732)	(864)
Cash flows from financing activities
Proceeds from the issuance of common stock	16,135
Proceeds from issuance of common stock under employee stock purchase plan	202
Proceeds from exercise of stock options	92	679
Payment of contingent consideration	(6,625)
Proceeds from term loan and notes payable	15,102	30,078
Repayment of term loan and notes payable	(3,025)	(25,419)
Payment of debt issuance costs	(2,115)	(109)
Deferred offering costs	(129)
Equity financing costs	(323)
Other	(15)
Net cash, cash equivalents and restricted cash (used in) provided by financing activities	19,299	5,229
Net decrease in cash, cash equivalents and restricted cash	(4,126)	(5,871)
Cash, cash equivalents, and restricted cash ‑ beginning of period	32,798	62,306
Cash, cash equivalents, and restricted cash ‑ end of period	28,672	56,435
Supplemental cash flow information:
Common stock issued for deferred offering costs	600
Deferred offering costs amortized against Additional paid-in capital	18
Original issuance discount	1,025
Deferred offering costs included in Accrued liabilities	118
Equity financing costs included in Accrued liabilities	47
Operating lease right-of-use assets obtained in exchange for lease liabilities	4,672
Finance lease right-of-use assets obtained in exchange for lease liabilities	123
Cash paid for interest	$ 344	$ 720