Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS USED IN OPERATING ACTIVITIES:
Net loss	$ (18,276)	$ (15,749)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	387	251
Amortization of premium/discount on marketable securities, net	0	19
Amortization of debt discount and debt issuance costs	415	358
Share-based compensation	4,145	5,410
Gain on extinguishment of debt	0	(1,960)
Changes in operating assets and liabilities:
Inventory	(1,923)	(256)
Accounts receivable, net	(6,925)	(5,995)
Prepaid expenses	(6,223)	(1,012)
Other current assets	2,463	(7,465)
Operating lease right of use assets	150	358
Accounts payable	(1,828)	(2,143)
Deferred revenue	0	(1,000)
Accrued expenses and other current liabilities	(12,385)	10,693
Lease liability, operating leases	(243)	(622)
Net cash used in operating activities	(40,243)	(19,113)
CASH FLOWS PROVIDED BY INVESTING ACTIVITIES:
Purchases of property and equipment	(157)	0
Sales and maturities of marketable securities	0	23,240
Net cash provided by investing activities	(157)	23,240
CASH FLOWS PROVIDED BY FINANCING ACTIVITIES:
Proceeds from exercise of stock options	0	3,764
Proceeds from issuance of term loan, net of issuance costs	0	122,687
Repurchase of convertible notes	0	(108,568)
Proceeds from issuance of shares under employee stock purchase plan	482	678
Net cash provided by financing activities	482	18,561
NET INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(39,918)	22,688
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	112,100	92,003
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	72,182	114,691
SUPPLEMENTAL DISCLOSURES:
Cash paid for interest	5,797	4,936
Cash paid for amounts included in the measurement of operating lease liabilities	253
Right of use assets obtained in exchange for operating lease liability	$ 488