Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jul. 31, 2016	Apr. 30, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015	Jan. 31, 2016
Class of Stock [Line Items]
Deferred professional costs	$ 652,000			$ 652,000		$ 571,000
Accumulated amortization of deferred costs	345,000			345,000		265,000
Amortization expense	36,000		$ 7,000	80,000	$ 48,000
Severance expenses	110,000		2,000	227,000	9,000
Accrued severances	146,000			146,000		26,000
Share-based compensation expense	432,000		$ 631,000	909,411	1,283,459
Cost of shares for tax withholding				11,702	$ 0
Reserves for uncertain tax positions and corresponding interest and penalties	0			0		0
Deferred finance costs	$ 0			$ 0		$ 270,147
Restricted Stock
Class of Stock [Line Items]
Antidilutive securities (in shares)				828,225	118,180
Stock Option
Class of Stock [Line Items]
Antidilutive securities (in shares)				2,172,480	2,978,344
Warrant
Class of Stock [Line Items]
Antidilutive securities (in shares)				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)		8,241
Cost of shares for tax withholding		$ 12,000
Shares awarded (in shares)				828,225
Senior Notes | Credit Agreement
Class of Stock [Line Items]
Deferred finance costs	$ 235,000			$ 235,000
Accumulated amortization of deferred financing costs	$ 120,000			$ 120,000