Derivative Liabilities (Details) - USD ($)			12 Months Ended
	Oct. 19, 2012	Aug. 16, 2012	Jan. 31, 2018	Jan. 31, 2017	Oct. 31, 2012
Derivative [Line Items]
Number of shares issuable (in shares)		1,200,000
Exercise price (in USD per share)		$ 3.99
Net of transaction costs, allocated to the warrants		$ 1,425,000
Fair value of warrants			$ 0	$ 46,191
Income recognized from changing in fair value of warrants			46,000	159,000
Estimate of Fair Value
Derivative [Line Items]
Fair value of warrants			$ 0	$ 46,000
Common Stock Warrant
Derivative [Line Items]
Number of shares issuable (in shares)			1,400,000
Exercise price (in USD per share)			$ 4.00
Placement Agent | Common Stock Warrant
Derivative [Line Items]
Number of shares issuable (in shares)	200,000
Exercise price (in USD per share)	$ 4.06
Annual volatility	75.00%
Risk-free rate	0.90%
Dividend yield	0.00%
Expected life	5 years
Placement Agent | Common Stock Warrant | Estimate of Fair Value
Derivative [Line Items]
Fair value of warrants					$ 4,139,000
Derivative
Derivative [Line Items]
Annual volatility			57.40%	62.60%
Risk-free rate			0.00%	0.50%
Dividend yield			0.00%	0.00%
Expected life			0 years	1 year