Annual report pursuant to Section 13 and 15(d)

Convertible Promissory Note Receivable - Narrative (Details)

v3.8.0.1
Convertible Promissory Note Receivable - Narrative (Details) - USD ($)
$ in Thousands
Sep. 01, 2017
Dec. 31, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Convertible promissory note receivable   $ 35,471 $ 0
Convertible promissory note      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Amortization of discount   700  
Convertible promissory note      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Convertible promissory note receivable $ 36,200 35,500  
Interest receivable   1,100  
Amortization of discount   $ 687  
Ticketfly | Sold      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total purchase price 200,000    
Cash portion of purchase price 150,000    
Convertible subordinated promissory note 50,000    
Unamortized discount 13,800    
Receivable with Imputed Interest, Purchase Price Adjustments $ 2,500    
Ticketfly | Sold | Convertible promissory note      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Note term 5 years    
Stated interest rate 6.50%