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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities      
Income/(Loss) for the year $ (37,065) $ (62,709) $ 4,568
Non-cash items:      
Depreciation and amortization 8,893 7,287 6,645
Share-based compensation expense 14,698 13,950 10,718
Share-based compensation expense 32,060 (179,316) (232,674)
Realized loss on sale of investments 29,303 20,925 54,976
Gain on dilution of ownership interest in associate (28,220) 0 0
Impairment of investment in associate 8,390 0 0
Gain on deconsolidation of subsidiary (27,251) 0 0
Share of net loss of associates accounted for using the equity method 27,749 73,703 34,117
Fair value gain on other financial instruments (8,163) (800) 0
Loss on disposal of assets 138 53 66
Income taxes, net (55,719) 3,756 14,402
Finance (income)/costs, net (138,924) (5,050) 6,114
Changes in operating assets and liabilities:      
Trade and other receivables (7,734) (617) (529)
Prepaid expenses (862) (5,350) (3,371)
Deferred revenue 2,123 (1,407) (5,223)
Trade and other payables 22,033 8,338 605
Other 359 (103) (7)
Income taxes paid (20,696) (27,766) (20,737)
Interest received 3,460 214 1,155
Interest paid (3,366) (3,382) (2,651)
Net cash used in operating activities (178,792) (158,274) (131,827)
Cash flows from investing activities:      
Purchase of property and equipment (2,176) (5,571) (5,170)
Proceeds from sale of property and equipment 0 30 0
Purchases of intangible assets 0 (90) (254)
Investment in associates (19,961) 0 0
Purchase of investments other than investments accounted for using equity method 0 0 (10,000)
Purchase of investments held at fair value (5,000) (500) (1,150)
Sale of investments held at fair value 118,710 218,125 350,586
Purchase of short-term note from associate 0 (15,000) 0
Repayment of short-term Note from associate 15,000 0 0
Purchases of Convertible Note (15,000) 0 0
Cash derecognized upon loss of control over subsidiary (see table below) (479) 0 0
Purchases of short-term investments (248,733) 0 0
Proceeds from maturity of short-term investments 50,000 0 30,116
Receipt of payment of sublease 415 381 350
Net cash provided by (used in) investing activities (107,223) 197,375 364,478
Cash flows from financing activities:      
Receipt of PPP loan 0 0 68
Issuance of long term loan 0 0 14,720
Issuance of subsidiary preferred Shares 0 37,610 13,750
Issuance of Subsidiary Convertible Note 393 2,215 25,000
Payment of lease liability (4,025) (3,375) (2,908)
Exercise of stock options 332 352 1,036
Settlement of restricted stock unit equity awards 0 (10,749) (12,888)
Vesting of restricted stock units and net share exercise 0 (2,582) 0
NCI exercise of stock options in subsidiary 7 66 0
Issuance of warrants in subsidiary 0 0 92
Purchase of treasury stock (26,492) 0 0
Acquisition of a non-controlling Interest of a subsidiary 0 (806) 0
Other (41) (5) 0
Net cash provided by (used in) financing activities (29,827) 22,727 38,869
Net increase (decrease) in cash and cash equivalents (315,842) 61,827 271,520
Cash and cash equivalents at beginning of year 465,708 403,881 132,360
Cash and cash equivalents at end of year 149,866 465,708 403,881
Supplemental disclosure of non-cash investment and financing activities:      
Partial settlement of share based liability awards and settlement of equity based RSUs 1,528 0 0
Purchase of property, plant and equipment against trade and other payables 0 1,841 0
Leasehold improvements purchased through lease incentives (deducted from Right of Use Asset) 0 1,010 0
Conversion of subsidiary convertible note into preferred share liabilities $ 0 $ 25,797 $ 0