Debt - Minimum EBITDA Levels (Details) - Credit Agreement	12 Months Ended
	Jan. 31, 2019 USD ($)
July 31, 2017
Debt Instrument [Line Items]
Minimum EBITDA level	$ (509,000)
October 31, 2017
Debt Instrument [Line Items]
Minimum EBITDA level	20,000
January 31, 2018
Debt Instrument [Line Items]
Minimum EBITDA level	204,000
April 30, 2018
Debt Instrument [Line Items]
Minimum EBITDA level	180,000
July 31, 2018
Debt Instrument [Line Items]
Minimum EBITDA level	508,000
October 31, 2018
Debt Instrument [Line Items]
Minimum EBITDA level	408,000
January 31, 2019
Debt Instrument [Line Items]
Minimum EBITDA level	$ 562,000