BALANCE SHEET COMPONENTS - Schedule of allowance for uncollectible accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning of period	$ 4	$ 0	$ 6	$ 0
Increase in provision	0	12	0	12
Amounts written off, less recoveries	0	0	(2)	0
Balance as of end of period	$ 4	$ 12	$ 4	$ 12