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BALANCE SHEET COMPONENTS - Schedule of allowance for uncollectible accounts (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accounts Receivable, Allowance for Credit Loss [Roll Forward]        
Balance as of beginning of period $ 8 $ 4 $ 18 $ 4
Increase in provision 0 6 5 6
Amounts written off, less recoveries (6) 0 (21) 0
Balance as of end of period $ 2 $ 10 $ 2 $ 10