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Balance Sheet Components - Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Accounts receivable, gross	$ 5,959	$ 10,938
Less: allowance for doubtful accounts	(34)	(23)	$ (45)	$ (21)
Accounts receivable, net	$ 5,925	$ 10,915

X

- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

+ References

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-Publisher FASB
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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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