Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 55,610	$ 170,064
Restricted cash	831	842
Marketable debt securities, available-for-sale	28,873	0
Accounts receivable, net	376	1,239
Prepaid expenses and other current assets	4,893	4,661
Total current assets	90,583	176,806
Marketable debt securities, available-for-sale, net of current portion	16,793	0
Property and equipment, net	3,044	2,984
Right-of-use assets, net	10,968	12,737
Intangible assets, net	25,250	35,962
Other long-term assets	339	530
Total assets	146,977	229,019
Current liabilities:
Accounts payable	3,205	5,272
Accrued liabilities	11,314	14,125
Operating lease liabilities, current portion	1,734	915
Deferred revenue, current portion	407	4,267
Total current liabilities	16,660	24,579
Operating lease liabilities, net of current portion	10,245	12,212
Deferred tax liabilities	880	880
Deferred revenue, net of current portion	1,342	1,381
Total liabilities	29,127	39,052
Commitments and contingencies (Note 7)
Shareholders' Equity (Deficit):
Ordinary Shares, par value $0.0001; 500,000,000 shares authorized at December 31, 2022 and 2021; 270,455,232 and 270,120,548 shares issued and outstanding as of December 31, 2022 and 2021, respectively	27	27
Additional paid-in capital	410,753	404,362
Accumulated other comprehensive loss	(1,302)	(790)
Accumulated deficit	(291,628)	(213,632)
Total shareholders' equity (deficit)	117,850	189,967
Total liabilities and shareholders' equity	$ 146,977	$ 229,019