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Stockholders' Equity (Tables)

12 Months Ended

Jul. 31, 2012

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]



	Shares
Outstanding at July 31, 2010	236,181
Issued	0
Exercised	(15,420)
Expired	(32,148)
Outstanding at July 31, 2011	188,613
Issued	238,699
Exercised	0
Expired	0
Outstanding at July 31, 2012	427,312

Summary Of Information Related To Warrants Outstanding [Table Text Block]



Expiration	Exercise
Date	Price		Shares
10/19/12	$	68.80		20,967
10/19/12	$	57.36		52,411
05/07/14	$	16.50		11,363
05/27/14	$	18.96		45,503
05/27/14	$	21.12		5,532
03/03/15	$	16.80		52,836
01/13/16	$	3.52		81,280
12/14/16	$	3.61		25,000
12/24/16	$	3.28		132,420
				427,312

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]



		Weighted-		Aggregate
		Average		Intrinsic
	Shares	Exercise Price		Value
Outstanding at July 31, 20	723,251	$	17.01	$	5,070,000
Granted	75,625	$	9.56
Exercised	(84,372)	$	5.11
Cancelled	(376,978)	$	14.58
Outstanding at July 31, 2011	337,526	$	21.02	$	30,000
Granted	40,625	$	6.68
Exercised	0	$	0
Cancelled	(29,688)	$	22.05
Outstanding at July 31, 2012	348,463	$	19.26	$	0

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]



	Shares
Outstanding at July 31, 2010	7,650
Granted	4,986
Vested	(7,650)
Forfeited	0
Outstanding at July 31, 2011	4,986
Granted	6,852
Vested	(4,986)
Forfeited	0
Outstanding at July 31, 2012	6,852

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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