Debt - EBITDA Covenant Thresholds (Details) - Credit Agreement	3 Months Ended
	Oct. 31, 2019 USD ($)
August 31, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	$ (505,000)
September 30, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(752,000)
October 31, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(850,000)
November 30, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(597,000)
December 31, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(608,000)
January 31, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(289,000)
February 29, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(124,000)
March 31, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(195,000)
April 30, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(683,000)
May 31, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(560,000)
June 30, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	(368,000)
Period ending July 31, 2020 and Thereafter
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	$ (374,000)