Revenue, Deferred Revenue And Prepaid Commissions - Prepaid Commissions (Details) - Prepaid Commissions $ in Thousands	6 Months Ended
Jun. 30, 2019 USD ($)
Capitalized Contract Cost
December 31, 2018	$ 2,394
Additions	2,408
Commissions Recognized	(2,722)
June 30, 2019	$ 2,080

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant