Debt - Minimum EBITDA Levels (Details) - Credit Agreement - USD ($)	12 Months Ended
	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016
Debt Instrument [Line Items]
Minimum EBITDA level				$ 3,000,000
Scenario, Forecast
Debt Instrument [Line Items]
Minimum EBITDA level	$ 0	$ 250,000	$ 1,500,000