Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Commitments and Contingencies (Textual)      
Royalty expenses $ 1,556 $ 893  
Deposits held by credit card processors $ 3,100   $ 2,800