Debt - EBITDA Covenant Thresholds (Details) - Credit Agreement	9 Months Ended
	Oct. 31, 2018 USD ($)
October 31, 2018
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	$ (509,000)
January 31, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	20,000
April 30, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	204,000
July 31, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	180,000
October 31, 2019
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	508,000
January 31, 2020
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	408,000
April 30, 2020 and each fiscal quarter thereafter
Debt Instrument [Line Items]
Debt covenant, minimum EBITDA	$ 562,000