Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Mar. 07, 2023	Mar. 31, 2023
Stockholders' Equity
Shares issued in a pre-closing funding	3,730,608
Issue price per share	$ 8.21
Value of shares issued in a pre-closing funding	$ 30,600
Issuance of common stock upon settlement of convertible promissory note, accrued interest, and related derivative liability (in shares)	5,059,338
Issuance of common stock upon settlement of convertible promissory note, accrued interest, and related derivative liability	$ 35,000	$ 42,447
Issuance of common stock to Sesen Bio shareholders in reverse capitalization (in shares)	10,374,272
Issuance of common stock to Sesen Bio shareholders in reverse capitalization		$ 72,044
Shares issued upon conversion of convertible preferred stock and exchangeable shares previously presented as noncontrolling interests	18,872,711