Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income / (loss)	$ 10,476	$ (66,572)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain from sale of priority review voucher, net	(62,010)
Depreciation and amortization	346	186
Stock-based compensation	9,525	4,665
Non-cash expense in connection with equity issuance to MSK/MIT		1,331
Non-cash expense in connection with equity issuance to inventors		7,376
Foreign currency transactions	513	(66)
Changes in assets and liabilities:
Accounts receivable, net	(8,517)
Inventories	(3,820)
Other current assets	4,284	(442)
Other assets	(1,503)	13
Accounts payable	(2,569)	1,305
Accrued liabilities and other	2,658	2,813
NET CASH USED IN OPERATING ACTIVITIES	(50,617)	(49,391)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(441)	(28)
Net proceeds from sale of priority review voucher	62,010
NET CASH PROVIDED BY/ (USED IN) INVESTING ACTIVITIES	61,569	(28)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common stock, net of issuance costs	107,725
Proceeds from exercised stock options	241	370
NET CASH PROVIDED BY FINANCING ACTIVITIES	107,966	370
Effect of exchange rates on cash and cash equivalents	35	(28)
NET INCREASE / (DECREASE) IN CASH AND CASH EQUIVALENTS	118,953	(49,077)
Cash and cash equivalents at the beginning of period	114,634	207,136
Cash and cash equivalents at the end of period	$ 233,587	$ 158,059