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Subsequent events	6 Months Ended
Subsequent events	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent events	Subsequent events In preparing the interim Condensed Consolidated Financial Statements, we have evaluated subsequent events occurring after June 30, 2018. Based on this evaluation, there were no subsequent events from June 30, 2018 through the date the Condensed Consolidated Financial Statements were issued.