Subsequent Events (Details)	Oct. 31, 2018 USD ($)	Jul. 31, 2018 USD ($)	Apr. 30, 2018 USD ($)	Nov. 10, 2017 USD ($)	Apr. 30, 2019	Jan. 31, 2019	Jun. 30, 2018	Dec. 08, 2017 USD ($)	Aug. 11, 2017 USD ($)	Jun. 27, 2017
Cerberus Credit Facility
Subsequent Event [Line Items]
Leverage ratio										3.00
Fixed charge ratio										1.50
Cerberus Credit Facility | Minimum
Subsequent Event [Line Items]
Liquidity Covenant									$ 3,000
Subsequent Event | Leverage Ratio Greater Than And Equal To Five
Subsequent Event [Line Items]
Leverage ratio				5.00
Subsequent Event | Leverage Ratio Less Than Three
Subsequent Event [Line Items]
Leverage ratio				3.00
Subsequent Event | Minimum | Leverage Ratio Greater Than And Equal To Three And Less Than Five
Subsequent Event [Line Items]
Leverage ratio				5.00
Subsequent Event | Maximum | Leverage Ratio Greater Than And Equal To Three And Less Than Five
Subsequent Event [Line Items]
Leverage ratio				3.00
Subsequent Event | Base Rate | Leverage Ratio Greater Than And Equal To Five
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				7.00%
Subsequent Event | Base Rate | Leverage Ratio Greater Than And Equal To Three And Less Than Five
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				6.50%
Subsequent Event | Base Rate | Leverage Ratio Less Than Three
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				6.00%
Subsequent Event | LIBOR
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				9.50%
Subsequent Event | LIBOR | Leverage Ratio Greater Than And Equal To Five
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				9.50%
Subsequent Event | LIBOR | Leverage Ratio Greater Than And Equal To Three And Less Than Five
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				9.00%
Subsequent Event | LIBOR | Leverage Ratio Less Than Three
Subsequent Event [Line Items]
Interest rate added to the reference rate (as a percent)				8.50%
Subsequent Event | Cerberus Credit Facility
Subsequent Event [Line Items]
Leverage ratio					4.65	4.75	10.50
Fixed charge ratio						1.20	0.35
Liquidity Covenant				$ 2,000,000
EBITDA before amendment	$ 4,700,000	$ 1,000,000	$ 800,000
EBITDA after amendment	$ 8,100,000	$ 3,400,000	$ 800,000
Subsequent Event | Cerberus Credit Facility | Minimum
Subsequent Event [Line Items]
Liquidity Covenant								$ 11,500,000