Annual report pursuant to Section 13 and 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Fair Value Measurements, Recurring and Nonrecurring (Details)

v3.8.0.1
Basis of Presentation and Summary of Significant Accounting Policies - Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2017
Aug. 31, 2016
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Earn-out liability       $ 114 $ 1,987  
Contingently issuable shares       1,448 4,545  
Total financial liabilities       1,582 6,965  
Unrealized gain (loss) on derivatives       $ 3,510 25,515 $ 11,938
Common Stock | UMG Recordings - Share Price Threshold | Price Per Share Scenario Two            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Shares issued in period (in shares)     400,000      
Common Stock | UMG Recordings - Share Price Threshold | Price Per Share Scenario One            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Shares issued in period (in shares)     500,000      
Common Stock | UMG Recordings            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Shares issued in period (in shares)   1,800,000        
Common Stock | UMG Recordings | Price Per Share Scenario Two            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Shares issued in period (in shares) 400,000 400,000.0        
Share Price (in usd per share) $ 12.00 $ 12 $ 12.00 $ 12    
Common Stock | UMG Recordings | Price Per Share Scenario One            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Shares issued in period (in shares) 500,000 500,000.0        
Share Price (in usd per share) $ 10.00 $ 10 $ 10.00 $ 10    
Global Eagle Warrants            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Liability warrants       $ 20 433  
Quotes Prices in Active Markets (Level 1)            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Earn-out liability       0 0  
Contingently issuable shares       0 0  
Total financial liabilities       0 0  
Quotes Prices in Active Markets (Level 1) | Global Eagle Warrants            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Liability warrants       $ 0 $ 0  
Quotes Prices in Active Markets (Level 1) | Global Eagle Warrants | Public Warrants            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Warrants (in shares)       6,173,228 6,173,228  
Significant Other Observable Inputs (Level 2)            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Earn-out liability       $ 0 $ 0  
Contingently issuable shares       0 0  
Total financial liabilities       0 0  
Significant Other Observable Inputs (Level 2) | Global Eagle Warrants            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Liability warrants       0 0  
Significant Other Unobservable Inputs (Level 3)            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Earn-out liability       114 1,987  
Contingently issuable shares       1,448 4,545  
Total financial liabilities       1,582 6,965  
Significant Other Unobservable Inputs (Level 3) | Global Eagle Warrants            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Liability warrants       $ 20 $ 433