Annual report pursuant to Section 13 and 15(d)

Organization, Nature of Operations, and Principles of Consolidation - Additional Information (Detail)

v3.8.0.1
Organization, Nature of Operations, and Principles of Consolidation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
May 04, 2016
Restructuring Cost And Reserve [Line Items]      
Percentage of digital streaming exclusively available for subscribers 90.00%    
Entity Incorporation, Date of Incorporation Jul. 07, 1988    
Maximum number of common stock and vested stock options for tender offer   12,000,000  
Stock Option [Member]      
Restructuring Cost And Reserve [Line Items]      
Repurchase of common stock, per share amount   $ 7.75  
Repurchase of common stock, shares   842,114  
Payments for repurchase of equity   $ 1.4  
Class A Common Stock [Member]      
Restructuring Cost And Reserve [Line Items]      
Repurchase of common stock, per share amount   $ 7.75  
Repurchase of common stock, shares   9,636,848  
Payments for repurchase of equity   $ 74.7  
Gaiam Brand Segment [Member] | Natural Habitat, Inc. [Member]      
Restructuring Cost And Reserve [Line Items]      
Percentage of noncontrolling interest in subsidiaries   51.40% 51.40%