Income Taxes - Tax Provision at Statutory Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Income Tax Contingency [Line Items]
Statutory income tax rate	32.90%
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal tax benefit at statutory rate of 32.9 percent	$ 1,047,221	$ 1,771,675
State and local taxes, net of federal benefit (expense)	195,117	84,402
Change in valuation allowance	4,504,875	(2,134,096)
Incentive stock options	(112,349)	(361,245)
Change in fair value of warrants liability	15,197	54,033
Goodwill basis difference recognized upon asset sale	0	(220,112)
Section 162(m) disallowance	0	(22,647)
Other	(24,673)	(23,272)
Reserve for uncertain tax position	(18,509)	(262,525)
Tax Cuts and Jobs Act	(5,827,034)	0
Other	213,791	(186,814)
Income tax benefit	83,830	12,024
Federal
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
R&D Credit	219,305	1,045,453
State
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
R&D Credit	$ (129,111)	$ 267,172