Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Income Tax Contingency [Line Items]
Valuation allowance	$ 16,318,124	$ 14,184,030
Change in valuation allowance	2,134,096	1,629,786
Unrecognized operating loss carryforwards for stock options	1,592,000
Unrecognized deferred tax asset for operating loss carryforwards for stock options	588,000
Reserves for uncertain tax positions and corresponding interest and penalties	263,000	0
Accrued interest and penalties	0	$ 0
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Operating loss carryforwards	44,293,000
Change in valuation allowance	2,134,000
Internal Revenue Service (IRS) | Alternative Minimum Tax
Income Tax Contingency [Line Items]
Operating loss carryforwards	39,909,000
State
Income Tax Contingency [Line Items]
Operating loss carryforwards, subject to expire next twenty fiscal years	$ 14,889,000