Related Party Transactions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Related Party Transaction [Line Items]
Travel and out of pocket expenses	$ 50
Investor
Related Party Transaction [Line Items]
Initial term of service agreements	1 year
Renewal term for service agreements	1 year
Termination period between extension date	60 days
EGI
Related Party Transaction [Line Items]
Percentage ownership of Par common stock (or more)	10.00%