Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 243,684	$ 273,243
Restricted cash	104	104
Prepaid income tax	0	332
Prepaid expenses and other current assets	22,764	21,621
Total current assets	266,552	295,300
NON-CURRENT ASSETS:
Investment	508	525
Property and equipment, net	415	398
Operating lease right-of-use assets	3,056	3,696
Deferred tax assets	1,232	766
Other assets	334	213
Total assets	272,097	300,898
CURRENT LIABILITIES:
Accounts payable	2,054	2,564
Accrued expenses and other liabilities	7,480	10,308
Operating lease liabilities - current	2,146	2,235
Total current liabilities	11,680	15,107
NON-CURRENT LIABILITIES
Operating lease liabilities - non-current	843	1,379
Total liabilities	12,523	16,486
Commitments and contingencies (Note 12)
SHAREHOLDERS' EQUITY:
Additional paid-in capital	448,271	444,750
Accumulated other comprehensive income	1,647	8,840
Accumulated deficit	(190,812)	(169,641)
Total shareholders' equity	259,574	284,412
Total liabilities and shareholders' equity	272,097	300,898
Ordinary shares
SHAREHOLDERS' EQUITY:
Ordinary and deferred shares	440	435
Deferred Shares
SHAREHOLDERS' EQUITY:
Ordinary and deferred shares	$ 28	$ 28