Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Common stock	Additional paid in capital	Accumulated deficit	Accumulated other comprehensive loss
Shares, beginning balance at Jan. 31, 2014		18,175,787
Stockholders' equity, beginning balance at Jan. 31, 2014	$ 29,491,047	$ 181,758	$ 76,983,088	$ (47,562,713)	$ (111,086)
Statement of Changes in stockholders' equity
Stock issued pursuant to Employee Stock Purchase Plan and exercise of stock options, shares		257,296
Stock issued pursuant to Employee Stock Purchase Plan and exercise of stock options	515,124	$ 2,573	512,551
Restricted stock issued, shares		120,306
Restricted stock issued	0	$ 1,203	(1,203)
Interest rate swap	111,086				111,086
Share-based compensation expense	1,934,298		1,934,298
Deemed dividends on Series A Preferred Stock	(1,038,310)		(1,038,310)
Net loss	(12,011,457)			(12,011,457)
Shares, ending balance at Jan. 31, 2015		18,553,389
Stockholders' equity, ending balance at Jan. 31, 2015	19,001,788	$ 185,534	78,390,424	(59,574,170)	0
Statement of Changes in stockholders' equity
Stock issued pursuant to Employee Stock Purchase Plan and exercise of stock options, shares		111,971
Stock issued pursuant to Employee Stock Purchase Plan and exercise of stock options	262,038	$ 1,120	260,918
Restricted stock issued, shares		118,180
Restricted stock issued		$ 1,182	(1,182)
Interest rate swap	0
Share-based compensation expense	2,386,489		2,386,489
Deemed dividends on Series A Preferred Stock	(1,336,072)		(1,336,072)
Net loss	(4,290,115)			(4,290,115)
Shares, ending balance at Jan. 31, 2016		18,783,540
Stockholders' equity, ending balance at Jan. 31, 2016	$ 16,024,128	$ 187,836	$ 79,700,577	$ (63,864,285)	$ 0