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Goodwill and Intagible Assets (Details 3) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 12,743	$ 15,120
Finite-lived intangible assets, gross	35,542	35,776
Intangible assets, accumulated amortization	22,799	20,656
Finite-lived intangible assets, net	12,743	15,120
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	17,750	17,912
Intangible assets, accumulated amortization	9,371	8,347
Finite-lived intangible assets, net	8,379	9,565
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	4,328	4,385
Intangible assets, accumulated amortization	1,595	1,450
Finite-lived intangible assets, net	2,733	2,935
Internally developed software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	2,327	2,324
Intangible assets, accumulated amortization	2,327	2,206
Finite-lived intangible assets, net	0	118
Proprietary content
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	8,206	8,223
Intangible assets, accumulated amortization	6,697	5,908
Finite-lived intangible assets, net	$ 1,509	2,315
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Finite-lived intangible assets, gross	$ 2,284	2,284
Intangible assets, accumulated amortization	2,284	2,284
Finite-lived intangible assets, net	0	0
Off-Market Favorable Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	647	648
Intangible assets, accumulated amortization	525	461
Finite-lived intangible assets, net	$ 122	$ 187
Headland Media Limited [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Headland Media Limited [Member] | Distribution rights
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Headland Media Limited [Member] | Internally developed software
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Headland Media Limited [Member] | Proprietary content
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
Videotel [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Videotel [Member] | Internally developed software
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years
Videotel [Member] | Proprietary content
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Videotel [Member] | Off-Market Favorable Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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-Topic 350
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