Unaudited condensed consolidated balance sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit loss	$ 8	$ 11
Investments, fair value	$ 3,316	$ 15,383
Ordinary shares, par value (in dollars per share)	$ 0.000006	$ 0.000006
Ordinary shares, shares authorized (in shares)	5,000,000,000	5,000,000,000
Ordinary shares, shares issued (in shares)	961,829,720	955,363,980
Ordinary shares, shares outstanding (in shares)	959,724,940	954,981,050
Treasury Stock (in shares)	2,104,780	382,930