Balance Sheets Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Accrued payroll and related benefits	$ 1,880	$ 2,243
Accrued customer rebates	218	216
Accrued interest	72	520
Price adjustment and other revenue reserves	1,222	1,580
Short term lease liability	1,874
Other accrued expenses	3,176	3,096
Total accrued expenses and other current liabilities	$ 8,442	$ 7,655