Debt - Covenants (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Line of Credit Facility [Line Items]
Minimum liquidity covenant amount	$ 5.0
Line of Credit
Line of Credit Facility [Line Items]
Minimum liquidity covenant amount	$ 5.0
Fixed Charge Coverage Ratio	100.00%
Line of Credit | Maximum
Line of Credit Facility [Line Items]
Debt default, interest rate increase	5.00%