Stockholders' Equity (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended					4 Months Ended	6 Months Ended	9 Months Ended	11 Months Ended	12 Months Ended			24 Months Ended						12 Months Ended								6 Months Ended	11 Months Ended
	Apr. 11, 2012	Jul. 31, 2012 contract	Apr. 30, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jul. 31, 2012 contract	Jul. 31, 2012 contract	Jul. 31, 2012 contract	Jun. 26, 2012	Jul. 31, 2012 contract	Jul. 31, 2012 loan contract	Jul. 31, 2011	Jul. 31, 2012 contract	Dec. 15, 2011	Dec. 14, 2011	Mar. 23, 2011	Oct. 31, 2010	Jul. 31, 2010	Jul. 31, 2012 Warrant [Member]	Jul. 31, 2012 Bridge Loan Financing [Member]	Jul. 31, 2012 Deferred Compensation, Share-based Payments [Member]	Jul. 31, 2011 Deferred Compensation, Share-based Payments [Member]	Jul. 31, 2012 Share Offering Agreement [Member]	Jul. 31, 2012 Common Stock [Member]	Jul. 31, 2012 Additional Paid In Capital [Member]	Jul. 31, 2012 Accumulated Deficit [Member]	Jul. 31, 2012 Warrant Liability [Member]	Jun. 26, 2012 Warrant Liability [Member]
State Of Reincorporation			Delaware
Preferred stock, shares authorized		5,000,000					5,000,000	5,000,000	5,000,000		5,000,000	5,000,000		5,000,000			5,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01					$ 0.01	$ 0.01	$ 0.01		$ 0.01	$ 0.01		$ 0.01
Common Stock,Authorized		100,000,000					100,000,000	100,000,000	100,000,000		100,000,000	100,000,000		100,000,000			50,000,000
Stock Issued During Period, Shares, Issued for Services	20,000			18,750																					38,750
Stock Available For Issuance Under Plan																						222,300
Stock Issued During Period, Value, Issued for Services				$ 97,000			$ 45,000					$ 142,000													$ 0	$ 142,000	$ 0
Amortization Of Capitalized Expense Shares Issued For Services												73,000
Aggregate Offering Price Of Common Stock, Authorized						7,000,000
Shares Sold By Arrangement With Third Party		167,136
Proceeds from Other Equity						949,000			1,719,000
Purchase Agreement With Third Party															2.5	7.5
Stock Shares Issued Third Party Agreement		718,463					718,463	718,463	718,463		718,463	718,463		718,463
Restricted Stock, Shares Issued, Third Party Agreement															19,613	58,838
Deferred Offering Costs Expense Recognized												424,000												287,000
Unamortized Fair Value Of Shares Issued												241,000
Fees Associated With The Third Party Offering												122,000												128,000
Fair Value Associated With Third Party Offering												296,000
Cash Fee Associated With Third Party Offering, Percentage Of Offering											6.00%	6.00%
Common Stock Shares To Be Purchase By Third Party In Warrant		25,000					25,000	25,000	25,000		25,000	25,000		25,000
Warrant Exercise Price Calculation Percentage											110.00%	110.00%
Investment Warrants, Exercise Price																					$ 3.28							$ 3.608
Fair Value Associated With Warrant		53,000					53,000	53,000	53,000		53,000	53,000		53,000
Value Of Common Stock Warrants Issued To Lenders And Placement Agent										297,000		286,000																	297,000
Debt Issuance , Number Of Secured Convertible Notes Issued											9	9
Proceeds from Warrant Exercises												0	259,000
Expected Volatility Rate																								82.44%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used											Black-Sholes	Black-Sholes
Volatility																				82.95%
Interest Rate																				0.85%
Dividend yield											0.00%	0.00%	0.00%							0.00%
Dividend yield																								0.00%
Interest Rate																								0.24%
Net Proceeds From Bridge Loan Financing												1,200,000	0
Short Term Debt Principal Due										1,333,000
Fair Value Of Common Stock Issued For Underwriting Services												2,000
Common Stock Issued For Underwriting Services											625	625
Common Stock Shares Held In Escrow For Repayment Of Note, Post Amendment											500,000	500,000
Sale of Stock, Price Per Share		$ 2.00					$ 2.00	$ 2.00	$ 2.00		$ 2.00	$ 2.00		$ 2.00				$ 17.60						$ 2.00
Stock Issued For Services Expense Recognized During Period								45,000
Proceeds from (Payments for) Other Financing Activities		5,010,000										650,000
Stock Issued During Period, Shares, Issued for Cash											325,125	325,125												250,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term											5 years 10 months 24 days	5 years 10 months 24 days										5 years 9 months 18 days
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options														278,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price		$ 19.26			$ 21.02		$ 19.26	$ 19.26	$ 19.26		$ 19.26	$ 19.26	$ 21.02	$ 19.26					$ 17.01
Net Exercise Net Shares Issued To Employees													27,538
Net Exercise Options Exercised													36,250
Issuance Of Common Stock In At The Market Offering Shares Issued													329,571
Issuance Of Common Stock In At The Market Offering Net Proceeds					3,065,000
Options Exercisable Outstanding		272,457					272,457	272,457	272,457		272,457	272,457		272,457
Common Stock,Issued		6,644,555			5,004,275		6,644,555	6,644,555	6,644,555		6,644,555	6,644,555	5,004,275	6,644,555
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value												$ 4.11											$ 4.70
Common Stock Warrants Issued To Placement Agent											4,374	4,374
Issuance Of Common Stock Under Purchase Plan Commitment Shares Value												296,000													1,000	295,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value													$ 1,089,000