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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Current assets    
Cash and cash equivalents $ 82,031 $ 121,330
Short-term investments 20,161 26,004
R&D benefit receivable 22,152 24,396
Other current assets 9,260 14,664
Trade receivables 28 972
Total current assets 133,632 187,366
Property, plant and equipment 1,655 1,818
Operating lease right-of-use asset 192 157
Goodwill 10,612 9,392
Other intangible assets 300 312
Other long-term assets 399 3,590
Total assets 146,790 202,635
Current liabilities    
Contract liabilities (301) (306)
Trade and other payables (16,993) (16,399)
Operating lease liabilities, current (85) (117)
Total current liabilities (17,379) (16,822)
Contract liabilities (55,251) (51,790)
Operating lease liabilities (97)  
Total liabilities (72,727) (68,612)
Commitments and contingencies (Note 11)
Shareholders' equity    
Ordinary shares - par value 0.05 per share; 141,701,848 shares issued at September 30, 2025 (December 31, 2024: 141,674,074) (10,290) (10,288)
Additional paid-in capital (617,648) (609,560)
Accumulated deficit 550,802 474,044
Accumulated other comprehensive loss 3,073 11,781
Total shareholders' equity (74,063) (134,023)
Total liabilities and shareholders' equity $ (146,790) $ (202,635)