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BALANCE SHEET DETAILS - Other Current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Other Liabilities, Current [Abstract]    
Lease liabilities - current $ 1,289 $ 1,382
Other current liabilities 1,683 1,075
Total other current liabilities $ 2,972 $ 2,457