Stock-Based Compensation (Details) - RSU's - 2013 Plan - shares	9 Months Ended
Sep. 30, 2019	Jul. 12, 2017
Stock-based compensation
Unvested RSU's	0	9,880
Minimum
Stock-based compensation
Initial vesting period of remaining RSU's vesting in April 2019	3 years
Maximum
Stock-based compensation
Initial vesting period of remaining RSU's vesting in April 2019	4 years
SourceHOV
Stock-based compensation
Restricted stock units outstanding		24,535

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant