UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities:
Net loss	$ (38,050)	$ (34,058)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	795	833
Amortization of intangible asset	18,021	18,021
Non-cash interest expense related to sale of future royalties	0	4,428
Non-cash royalty revenue related to sale of future royalties	(936)	(764)
Non-cash collaboration revenue	0	(9,550)
Non-cash research and development expense	782	0
Non-cash interest expense	983	916
Non-cash operating lease expense	(955)	(1,198)
Non-cash write-off from termination of lease	(825)	0
Write-down of inventory	612	7,430
Change in excess inventory purchase commitments	0	4,854
Stock-based compensation expense	5,979	11,453
Change in fair value of embedded debt derivative	0	(710)
Changes in operating assets and liabilities:
Accounts receivable	20,712	(30,421)
Inventory	10,828	(4,362)
Prepaid expenses and other current assets	7,684	561
Other long-term assets	(5,876)	10,012
Accounts payable	(12,058)	(8,807)
Accrued expense and other current liabilities	(19,382)	(19,464)
Operating lease liabilities	1,034	1,205
Deferred revenue	(3,738)	5,963
Other long-term liabilities	481	(8,622)
Net cash used in operating activities	(13,909)	(52,280)
Investing Activities:
Purchases of equipment	0	(114)
Net cash used in investing activities	0	(114)
Financing Activities:
Proceeds from refund liabilities to customers	0	40,000
Proceeds from issuance of common stock, net of issuance costs	0	7,102
Proceeds from issuances of stock under employee stock purchase plan	34	367
Proceeds from the exercise of stock options	0	67
Repayments of term debt	(24,000)	0
Net cash (used in) provided by financing activities	(23,966)	47,536
Decrease in cash, cash equivalents and restricted cash	(37,875)	(4,858)
Cash, cash equivalents and restricted cash — beginning of period	93,169	151,839
Cash, cash equivalents and restricted cash — end of period	$ 55,294	$ 146,981