Income Taxes - Tax Provision at Statutory Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal tax benefit at statutory rate	$ 1,771,675	$ 1,455,816
State and local taxes, net of federal benefit (expense)	84,402	(267,997)
Change in valuation allowance	(2,134,096)	(1,629,786)
Incentive stock options	(361,245)	(513,708)
Escrow refund	0	255,000
Change in fair value of warrants liability	54,033	553,951
Goodwill basis difference recognized upon asset sale	(220,112)	0
Section 162(m) disallowance	(22,647)	0
Other	(23,272)	(28,914)
Reserve for uncertain tax position	(262,525)	0
Other	(186,814)	167,635
Income tax (expense) benefit	12,024	(8,003)
Federal
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
R&D Credit	1,045,453	0
State
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
R&D Credit	$ 267,172	$ 0