CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (31,264)	$ (37,513)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	2,908	1,160
Amortization of deferred financing cost	56	76
Non-cash operating lease expense	(738)	188
Stock based compensation	3,797	2,380
Change in operating assets and liabilities:
Escrow deposit	220	125
Prepaid expenses and other assets	(160)	1,033
Operating lease liability	3,842	(152)
Deferred revenue	(1,720)	122,129
Accounts payable	(2,954)	(1,503)
Accrued expenses and other liabilities	(3,206)	(1,170)
Net cash (used in) provided by operating activities	(29,219)	86,753
Cash flows from investing activities
Acquisition of property and equipment	(4,991)	(4,067)
Acquisition of fixed maturity securities, available for sale	(42,829)	(103,060)
Sale of fixed maturity securities, available for sale	79,158	63,090
Net cash provided by (used in) investing activities	31,338	(44,037)
Cash flows from financing activities
Proceeds from issuance of common stock	448	65
Proceeds from issuance of shares to collaboration partner		26,813
Net cash provided by financing activities	448	26,878
Net increase in cash, cash equivalents, and restricted cash	2,567	69,594
Cash, cash equivalents and restricted cash, beginning of period	86,244	58,162
Cash, cash equivalents and restricted cash, end of period	88,811	127,756
Supplemental disclosure of cash and non-cash operating activities:
Cash paid for interest	345	238
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment, accrued and unpaid	$ 975	$ 3,796