Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Details)

v3.20.2
Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Shares of common stock   $ 3,315  
Total fair value of assets   3,315  
Liabilities, Fair Value Disclosure [Abstract]      
Contingently issuable shares   116 $ 305
Phantom stock options   387 464
Total financial liabilities   503 769
Fair Value, Measurements, Recurring | Quotes prices in active markets (Level 1)      
Assets, Fair Value Disclosure [Abstract]      
Shares of common stock   3,315  
Total fair value of assets   3,315  
Liabilities, Fair Value Disclosure [Abstract]      
Contingently issuable shares   0 0
Phantom stock options   0 0
Total financial liabilities   0 0
Fair Value, Measurements, Recurring | Significant other observable inputs (Level 2)      
Assets, Fair Value Disclosure [Abstract]      
Shares of common stock   0  
Total fair value of assets   0  
Liabilities, Fair Value Disclosure [Abstract]      
Contingently issuable shares   0 0
Phantom stock options   0 0
Total financial liabilities   0 0
Fair Value, Measurements, Recurring | Significant other unobservable inputs (Level 3)      
Assets, Fair Value Disclosure [Abstract]      
Shares of common stock   0  
Total fair value of assets   0  
Liabilities, Fair Value Disclosure [Abstract]      
Contingently issuable shares   116 305
Phantom stock options   387 464
Total financial liabilities   503 $ 769
Common Stock | Price Per Share Scenario One | UMG Recordings      
Liabilities, Fair Value Disclosure [Abstract]      
Shares issued in period (in shares) 20,000    
Share price (in usd per share) $ 250.00    
Common Stock | Price Per Share Scenario Two | UMG Recordings      
Liabilities, Fair Value Disclosure [Abstract]      
Shares issued in period (in shares) 16,000    
Share price (in usd per share) $ 300.00    
Cash-Settled Phantom Stock Options | Fair Value, Measurements, Recurring      
Liabilities, Fair Value Disclosure [Abstract]      
Phantom stock options   400  
Cash-Settled Phantom Stock Options | Fair Value, Measurements, Recurring | Significant other unobservable inputs (Level 3)      
Liabilities, Fair Value Disclosure [Abstract]      
Phantom stock options liability   $ 400