Financial Statement Components - Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued expenses	$ 4,959	$ 3,998
Warranty liabilities	331	259
Contract liabilities	586	2,284
Accrued compensation and benefits	3,788	3,071
Contract losses	220	558
Finance lease (capital lease prior to adoption of ASC 842) liabilities, current	273
Finance lease (capital lease prior to adoption of ASC 842) liabilities, current		282
Employee tax withholding	2,747	0
Total accrued and other current liabilities	$ 12,904	$ 10,452
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accrued and other current liabilities

Accrued Salaries And Employee Benefits, Current

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory payroll taxes incurred through that date and withheld from employees pertaining to services received from them, including entity's matching share of the employees FICA taxes and contributions to the state and federal unemployment insurance programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Amount of allowance for credit loss for right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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Indicates line item in statement of financial position that includes current finance lease liability.

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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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