Other Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Financial Information [Abstract]
Accounts receivable, gross	$ 13,287	$ 10,608
Less: Allowance for doubtful accounts	(308)	(396)
Accounts receivable, net	$ 12,979	$ 10,212

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant