Stockholders' Equity

6 Months Ended

Apr. 30, 2012

Stockholders' Equity/Comprehensive Income (Loss) [Abstract]

STOCKHOLDERS' EQUITY

10. STOCKHOLDERS’ EQUITY

Common stock warrants and units

The following table sets forth the number shares of common stock purchasable under outstanding stock purchase warrants at April 30, 2012 and October 31, 2011:

			Exercise		April 30,		October 31,
Issued in connection with	Issue date	Expiration date	Price		2012		2011
Equity financing	September 5, 2007	March 5, 2013	$	2.04		1,110,001		1,110,001
Consulting services	June 14, 2006	May 31, 2013	$	1.55		16,500		16,500
Consulting services	March 29, 2010	March 28,2015	$	1.06		50,000		70,000
						1,176,501		1,196,501

In the six months ended April 30, 2012, 20,000 warrants were exercised on a cashless basis for 12,320 shares. In the six months ended April 30, 2011, 537,734 warrants were exercised for $1,097, 53,500 warrants were exercised on a cashless basis for 36,037 shares and 359,333 previously-outstanding units issued in the Company’s 2007 sale of stock and units were exercised for $594. There were no other changes to the status of the Company’s outstanding warrants and units in the six months ended April 30, 2012 or 2011.