Quarterly report pursuant to Section 13 or 15(d)

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Mar. 31, 2023
£ / shares
Dec. 31, 2022
£ / shares
UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS        
Allowance for expected credit losses $ 0 $ 0    
Property, plant and equipment, accumulated depreciation 38,534 38,588    
Intangibles, accumulated amortization 4,904 4,676    
Operating lease right-of-use assets, accumulated amortization $ 10,296 $ 9,470    
Common stock, par value | £ / shares     £ 0.001 £ 0.001
Common stock, shares authorized | shares 1,282,773,750 1,282,773,750    
Common stock, shares issued | shares 993,699,960 987,109,890    
Common stock, shares outstanding | shares 993,699,960 987,109,890