Stockholders' Equity (Narrative) (Details) (USD $)	1 Months Ended				11 Months Ended	12 Months Ended						0 Months Ended	1 Months Ended	12 Months Ended					12 Months Ended											0 Months Ended	1 Months Ended			12 Months Ended		12 Months Ended
	May 23, 2013	Apr. 17, 2013	Apr. 24, 2013	Jun. 29, 2012	Jun. 26, 2012	Jul. 31, 2013 item contract	Jul. 26, 2012	Jul. 31, 2012 security	Sep. 17, 2012	Aug. 15, 2012	Aug. 14, 2012	Apr. 10, 2012 Investor Relations [Member]	Oct. 31, 2011 Investor Relations [Member]	Jul. 31, 2013 Investor Relations [Member]	Jul. 31, 2012 Investor Relations [Member]	Jul. 31, 2012 Lincoln Park Capital Fund, LLC [Member]	Dec. 15, 2011 Lincoln Park Capital Fund, LLC [Member]	Dec. 14, 2011 Lincoln Park Capital Fund, LLC [Member]	Jul. 31, 2012 Warrant [Member]	Jul. 31, 2013 Bridge Loan Financing [Member]	Jul. 31, 2013 Deferred Compensation, Share-based Payments [Member]	Jul. 31, 2012 Deferred Compensation, Share-based Payments [Member]	Jul. 31, 2012 Share Offering Agreement [Member]	Jul. 31, 2013 Common Stock [Member]	Jul. 31, 2012 Common Stock [Member]	Jul. 31, 2013 Paid-in Capital [Member]	Jul. 31, 2012 Paid-in Capital [Member]	Jul. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Jul. 31, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Jul. 10, 2013 Private Placement [Member]	Jun. 26, 2013 Private Placement [Member]	Apr. 24, 2013 Private Placement [Member]	Jul. 10, 2013 Private Placement [Member]	Jul. 31, 2013 Private Placement [Member]	Apr. 17, 2013 Private Placement [Member]	Jul. 31, 2013 Warrant Liability [Member]	Jul. 31, 2012 Warrant Liability [Member]	Jul. 31, 2013 Maximum [Member]
Stockholders Equity Note [Line Items]
Stock split, conversion ratio						0.125		0.125
Common stock, shares outstanding						12,569,503		6,644,555		7,200,000	57,800,000
Common stock, par value						$ 0.01		$ 0.01
Preferred stock, shares authorized						5,000,000		5,000,000
Preferred stock, par value						$ 0.01		$ 0.01
Preferred stock, shares issued						0		0
Preferred stock, shares oustanding						0		0
Common Stock,Authorized						100,000,000		100,000,000
Stock Available For Issuance Under Plan																					127,059
Aggregate number of shares for public offering									4,341,615
Common stock at a price per share									$ 1.10														$ 2.00									$ 0.40		$ 0.30	$ 0.40
Gross proceeds from issuance of common stock						$ 4,776,000																										$ 400,000
Transaction costs from issued common stock						549,000																										16,000
Net proceeds from the sale of common stock						4,666,000		3,818,000																								384,000		4,227,000
Repayment of indebtedness																				1,333,000
Stock Issued During Period, Shares, Issued for Services	150,000											20,000	18,750	250,000										400,000	38,750
Stock Issued During Period, Value, Issued for Services	71,000					231,000		142,000				45,000	97,000	160,000										4,000	0	227,000	142,000	0	0
Common Stock,Issued						12,569,503		6,644,555									19,613															1,000,000		183,333
Warrants to purchase common stock shares				81,280																												500,000	91,667
Warrant Term																																3 years	3 years				4 years
Investment Warrants, Exercise Price				$ 3.52																												$ 0.65	$ 0.50			$ 3.608
Proceeds from Warrant Exercises		119,000	100,000																				500,000							13,000	13,000			55,000
Volatility		140.63%	140.75%	82.44%		134.80%		85.41%											82.95%											146.89%	146.80%
Warrant, Interest Rate		0.44%	0.43%																											0.73%	0.69%
Warrant, Dividend yield		0.00%	0.00%																											0.00%	0.00%
Warrants Issued Per Day						100
Maximum Possible Number Of Warrants Issued On Incomplete Filing						18,000
Additional Warrants Shares Received						5,300
Dividend yield				0.00%		0.00%		0.00%											0.00%
Interest Rate				0.24%		0.85%		0.75%											0.85%
Aggregate Offering Price Of Common Stock, Authorized								7,000,000
Shares Sold By Arrangement With Third Party								167,136								718,463
Proceeds from Other Equity								949,000								1,719,000
Amortization Of Capitalized Expense Shares Issued For Services						24,000		73,000
Purchase Agreement With Third Party																	2,500,000	7,500,000
Restricted Stock, Shares Issued, Third Party Agreement																		58,838
Fees Associated With The Third Party Offering								122,000															128,000
Fair Value Associated With Third Party Offering								296,000
Common Stock, Shares, Issued To Investors								78,451
Deferred Offering Costs Expense Recognized								424,000
Unamortized Fair Value Of Shares Issued								241,000
Cash Fee Associated With Third Party Offering, Percentage Of Offering								6.00%
Common Stock Shares To Be Purchase By Third Party In Warrant								25,000
Warrant Exercise Price Calculation Percentage						110.00%
Fair Value Associated With Warrant				80,000				53,000
Stock Issued During Period, Shares, Issued for Cash				325,125																			250,000
Stock Issued During Period Expense Issued For Services															45,000
Common Stock Warrants Issued To Lenders																																					128,046
Warrant Exercise Price, Bridge Loan Warrants								$ 3.28
Value Of Common Stock Warrants Issued To Lenders And Placement Agent					51,000	286,000	297,000
Proceeds from (Payments for) Other Financing Activities				$ 650,000
Common Stock Issued For Underwriting Services								625
Weighted average remaining contractual term						6 years 8 months 12 days															5 years 10 months 24 days
Options exercisable, weighted-average exercise price						$ 12.07
Options Exercisable Outstanding						307,665
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value						$ 0.69																$ 4.11
Common Stock Warrants Issued To Placement Agent								4,374
Expected life						5 years 22 days		4 years																														10 years