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Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jul. 01, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net revenue	$ 36,913	$ 38,104
Advertising expenses	900
Accounts receivable, net	56,465		$ 66,202
Gain on equity securities	(328)
Impairment of trademark	$ 161,224
Number of operating segments \| segment	1
Number of reportable segments \| segment	1
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Useful Lives	2 years
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising expenses		$ 100
Useful Lives	15 years
Trademarks [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment of trademark	$ 161,224
Gaiam Pty Limited [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity method investment, noncontrolling interest				49.90%
Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	35.00%		44.00%
Accounts Receivable [Member] \| License One [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	22.00%		19.00%
Accounts Receivable [Member] \| License Two [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	13.00%		13.00%
Accounts Receivable [Member] \| License Three [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage			12.00%
Sales Revenue, Services, Net [Member] \| License One [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	12.00%	11.00%
Sales Revenue, Services, Net [Member] \| License Two [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	11.00%	10.00%
Sales Revenue, Services, Net [Member] \| License Three [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	10.00%
Advertising Member
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net revenue	$ 0	$ 0