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	$ (21,164)	$ (20,976)
Adjustments to reconcile net loss to cash flows used in operating activities:
Amortization of intangible assets	0	615
Depreciation of property and equipment	105	81
Amortization of debt discount and premium and discount on available-for-sale marketable securities	(244)	110
Loss on extinguishment of debt	0	1,559
Stock-based compensation	3,050	3,477
Changes in operating assets and liabilities:
Accounts receivable and other current assets	4,932	(2,937)
Inventory	(1,185)	280
Accounts payable and accrued expenses	(2,267)	(2,107)
Right-of-use assets and operating lease liabilities	193	(35)
Deferred revenue	(255)	(225)
Net cash used in operating activities	(16,835)	(20,158)
Cash flows from investing activities:
Purchases of marketable securities	(2,930)	(62,293)
Sales and maturities of marketable securities	35,500	6,000
Purchases of property and equipment	(484)	(149)
Net cash provided by (used in) investing activities	32,086	(56,442)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	30,000
Payment of equity and debt issue costs	0	(352)
Payment of long-term debt	0	(38,235)
Payment of extinguishment of debt costs	0	(2,294)
Borrowings under revolving facility	5,300	11,459
Repayment under revolving facility	(10,480)	(984)
Net settlement of stock units to satisfy statutory tax withholding	(169)	(250)
Proceeds from exercise of stock options	248	241
Principal payments on finance lease obligations	(18)	(33)
Net cash used in financing activities	(5,119)	(448)
Net increase (decrease) in cash, cash equivalents and restricted cash	10,132	(77,048)
Cash, cash equivalents and restricted cash at beginning of period	95,783	178,743
Cash, cash equivalents and restricted cash at end of period	105,915	101,695
Reconciliation of cash, cash equivalents and restricted cash to the consolidated balance sheets:
Cash and cash equivalents	105,765	101,545
Restricted cash	150	150
Total cash, cash equivalents and restricted cash at end of period	105,915	101,695
Supplemental cash flow information:
Cash interest paid	740	941
Supplemental disclosure of non-cash investing and financing activities:
Debt issue costs	0	244
Accrued term loan exit fee	$ 0	$ 600