Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Class of Stock [Line Items]
Deferred professional costs	$ 465,000		$ 465,000		$ 500,000
Accumulated amortization of deferred costs	252,000		252,000		370,000
Amortization expense	43,000	$ 36,000	126,000	$ 80,000
Severance expenses	3,000	110,000	58,000	227,000
Accrued severances	9,000		9,000		9,000
Share-based compensation expense	288,000	$ 432,000	555,229	909,411
Cost of shares for tax withholding			37,002	$ 11,702
Reserves for uncertain tax positions and corresponding interest and penalties	$ 289,000		$ 289,000		$ 263,000
Restricted Stock
Class of Stock [Line Items]
Antidilutive securities (in shares)	831,587	828,225	831,587	828,225
Stock Option
Class of Stock [Line Items]
Antidilutive securities (in shares)	2,239,047	2,172,480	2,239,047	2,172,480
Warrant
Class of Stock [Line Items]
Antidilutive securities (in shares)	1,400,000	1,400,000	1,400,000	1,400,000
Series A Preferred Stock
Class of Stock [Line Items]
Convertible redeemable preferred stock, shares outstanding (in shares)	2,949,995		2,949,995		2,949,995
Number of common shares for each convertible preferred share (in shares)	1		1
Restricted Stock
Class of Stock [Line Items]
Service period (in years)			1 year
Shares surrendered for tax withholding (in shares)			28,056
Cost of shares for tax withholding			$ 37,000
Number of restricted stock awarded to directors (in shares)			220,337