Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Stingray Acquisition Narrative (Details)

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Acquisitions - Stingray Acquisition Narrative (Details) - Stingray Acquisitions
$ / shares in Units, $ in Thousands
Jun. 05, 2017
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
May 12, 2017
agreement
Business Acquisition [Line Items]      
Number of contribution agreements entered into | agreement     2
Shares issued in acquisition (in shares) | shares 1,392,548    
Business acquisition, share price (in dollars per share) | $ / shares $ 18.50    
Purchase price $ 25,762    
Transaction related costs expensed   $ 200