Related Party Transactions (Details) - USD ($)	6 Months Ended			12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Real Salt Lake | Partnership Terms
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction		$ 1,000,000	$ 200,000	$ 2,200,000
Real Salt Lake | Partnership Terms | Forecast
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 3,000,000
Dinng | Branding And Marketing Services
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction		0	200,000
Gig Economy Group | Software Development
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction		1,300,000	0
Outhink Inc | Consulting Services
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction		$ 0	$ 100,000