Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Income Tax Contingency [Line Items]
Valuation allowance	$ 14,184,030	$ 12,554,242
Change in valuation allowance	1,629,786	$ 4,030,864
Unrecognized operating loss carryforwards for stock options	1,592,000
Unrecognized deferred tax asset for operating loss carryforwards for stock options	588,000
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Operating loss carryforwards	44,347,000
Change in valuation allowance	1,630,000
Internal Revenue Service (IRS) | Alternative Minimum Tax
Income Tax Contingency [Line Items]
Operating loss carryforwards	39,656,000
State
Income Tax Contingency [Line Items]
Operating loss carryforwards, subject to expire next twenty fiscal years	$ 16,144,000