Credit Risk and Allowance for Credit Losses - Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Accounts receivable	$ 34,349	$ 25,503
Less: Allowance for credit losses	(1,119)	(269)
Accounts receivable, net	$ 33,230	$ 25,234

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