Private Placement Investment - Series A Convertible Preferred Stock Narrative (Details) - USD ($)			12 Months Ended
	Nov. 01, 2012	Aug. 16, 2012	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2014	Aug. 31, 2016
Class of Stock [Line Items]
Common shares issued for convertible note and accrued interest (in shares)	1,583,210
Redemption price per share (in USD per share)						$ 3.00
Series A Preferred Stock
Class of Stock [Line Items]
Accretion of Preferred Stock discount			$ 0	$ 876,000
Maximum conversion period	4 years
Shares converted (in shares)					1,050,000
Amount converted					$ 3,150,000
Convertible redeemable preferred stock, shares outstanding (in shares)				2,949,995
Convertible Subordinated Notes Payable
Class of Stock [Line Items]
Convertible notes payable	$ 5,699,577
Convertible Notes to Preferred Stock | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in USD per share)	$ 5.80
Conversion basis (in shares)	1
Loss upon conversion	$ 5,913,000
Issuance of shares at redemption value for conversion of notes payable	9,183,000
Carrying value and unamortized deferred financing costs	3,270,000
Aggregate redemption value	4,750,000
Difference between fair value and redemption value recorded as additional paid in capital	$ 4,433,000
Annual volatility	75.00%
Risk-free rate	0.80%
Dividend yield	0.00%
Private Placement | Series A Preferred Stock
Class of Stock [Line Items]
New issuance of series A convertible preferred stock (in shares)		2,416,785
Preferred stock, par value (in USD per share)		$ 3.00
Conversion basis (in shares)		1
Common stock, market value per share (in USD per share)		$ 3.82
Period over which share price is evaluated			10 days
Share price (in USD per share)		$ 3.00	$ 8.00
Period over which trade volume is evaluated			60 days
Average daily trading volume for period (in shares)			100,000
Stock price at time of conversion (in USD per share)			$ 3.00
Preferred stock, discount on shares		$ 1,020,000	$ 4,410,000
Beneficial conversion feature			$ 2,686,000
Common shares issued for convertible note and accrued interest (in shares)		1,583,210
Annual volatility		75.00%
Risk-free rate		0.90%
Dividend yield		0.00%
Maximum conversion period		4 years
Private Placement | Convertible Subordinated Notes Payable
Class of Stock [Line Items]
Convertible notes payable		$ 5,699,577
Minimum | Convertible Notes to Preferred Stock | Series A Preferred Stock
Class of Stock [Line Items]
Stock price at time of conversion (in USD per share)	$ 3.00
Minimum | Private Placement | Series A Preferred Stock
Class of Stock [Line Items]
Stock price at time of conversion (in USD per share)		$ 3.00
Maximum | Convertible Notes to Preferred Stock | Series A Preferred Stock
Class of Stock [Line Items]
Stock price at time of conversion (in USD per share)	$ 8.00
Maximum | Private Placement | Series A Preferred Stock
Class of Stock [Line Items]
Stock price at time of conversion (in USD per share)		$ 8.00