Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 879,844	$ 1,008,470
Short-term investments	50,550	0
Accounts receivable (net of allowance for credit loss of $13 and $11 as of March 31, 2023 and December 31, 2022, respectively)	43,346	39,963
Notes receivable	17,381	8,608
Inventories, net	38,405	31,621
Prepayments and other current assets	42,772	35,674
Total current assets	1,072,298	1,124,336
Restricted cash, non-current	1,003	803
Long term investments (including the fair value measured investment of $6,872 and $6,431 as of March 31, 2023 and December 31, 2022, respectively)	6,872	6,431
Prepayments for equipment	1,721	1,396
Property and equipment, net	58,309	57,863
Operating lease right-of-use assets	20,148	19,512
Land use rights, net	6,920	6,892
Intangible assets, net	1,479	1,511
Long-term deposits	1,324	1,396
Total assets	1,170,074	1,220,140
Current liabilities:
Accounts payable	66,361	65,974
Current operating lease liabilities	7,318	7,050
Other current liabilities	50,881	66,818
Total current liabilities	124,560	139,842
Deferred income	30,968	21,360
Non-current operating lease liabilities	12,979	13,343
Other non-current liabilities	325	0
Total liabilities	168,832	174,545
Commitments and contingencies (Note 15)
Shareholders’ equity
Ordinary shares (par value of $0.000006 per share; 5,000,000,000 shares authorized; 967,197,350 and 962,455,850 shares issued as of March 31, 2023 and December 31, 2022, respectively; 963,688,740 and 960,219,570 shares outstanding as of March 31, 2023 and December 31, 2022, respectively)	6	6
Additional paid-in capital	2,911,454	2,893,120
Accumulated deficit	(1,910,504)	(1,861,360)
Accumulated other comprehensive income	17,272	25,685
Treasury Stock (at cost, 3,508,610 and 2,236,280 shares as of March 31, 2023 and December 31, 2022, respectively)	(16,986)	(11,856)
Total shareholders’ equity	1,001,242	1,045,595
Total liabilities and shareholders’ equity	$ 1,170,074	$ 1,220,140