Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 165,081	$ 220,198
Restricted cash	389	440
Prepaid expenses and other current assets	35,821	40,658
Total current assets	201,291	261,296
NON-CURRENT ASSETS:
Operating lease right-of-use assets	2,006	4,306
Deferred tax assets	3,774	3,336
Long-term prepaid expenses and other assets	6,595	7,049
Total assets	213,666	275,987
CURRENT LIABILITIES:
Accounts payable	12,283	5,892
Accrued expenses and other liabilities	14,495	11,301
Debt, current portion	5,513	0
Operating lease liabilities - current	1,725	2,411
Total current liabilities	34,016	19,604
NON-CURRENT LIABILITIES
Debt, non-current portion	24,652	28,757
Operating lease liabilities - non-current	303	1,882
Total liabilities	58,971	50,243
Commitments and contingencies (Note 12)
SHAREHOLDERS' EQUITY:
Ordinary shares, £0.008 par value; 68,552,215 and 61,943,471 shares authorized, issued and outstanding at December 31, 2024 and 2023, respectively	702	635
Additional paid-in capital	704,919	621,645
Accumulated other comprehensive loss	(16,194)	(16,926)
Accumulated deficit	(534,732)	(379,610)
Total shareholders' equity	154,695	225,744
Total liabilities and shareholders' equity	$ 213,666	$ 275,987