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Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
Cash flow from operating activities:
Payments to suppliers, employees and consultants	$ (2,566,980)	$ (2,372,530)
Cash received from sales of product and services	129,963	115,645
Cash received from display technology license fee, net of taxes	2,400,000	300,000
Dividend received	33,507	68,211
Net cash used in operating activities	(3,510)	(1,888,674)
Cash flow from investing activities:
Disbursements to acquire short-term investments in U.S. government securities and certificates of deposit	(3,747,543)	(749,870)
Proceeds from the sale or maturities of short-term investments in U.S. government securities	749,740	1,500,000
Proceeds from sale of Digital Info Security Co., Inc. common stock	118,777	46,761
Payments for purchases of property and equipment	(9,028)
Net cash (used in) provided by investing activities	(2,888,054)	796,891
Cash flow from financing activities:
Proceeds from private placement	1,250,000
Proceeds from exercise of stock options	1,098,850	1,049,500
Net cash provided by financing activities	2,348,850	1,049,500
Net decrease in cash and cash equivalents	(542,714)	(42,283)
Cash and cash equivalents at beginning of period	1,094,116	1,451,241
Cash and cash equivalents at end of period	551,402	1,408,958
Reconciliation of net loss to net cash used in operating activities:
Net loss	(4,586,647)	(4,048,201)
Provision for slow moving inventory reserve	(2,205)	39,761
Depreciation expense	5,992	6,303
Amortized discount on investments (U.S. government securities)	(791)	(188)
Gain on sale of Digital Info Security Co., Inc. common stock	(30,169)	(5,444)
Change in operating assets and liabilities:
Inventories	20,816	33,703
Prepaid expenses and other current assets	27,848	2,340
Accounts payable and accrued liabilities	(96,679)	96,303
Deferred revenue	2,574,000
Net cash used in operating activities	(3,510)	(1,888,674)
Nonemployees [Member]
Reconciliation of net loss to net cash used in operating activities:
Stock option compensation	44,034	6,392
Stock awards granted pursuant to stock incentive plans	84,221	52,696
Employees [Member]
Reconciliation of net loss to net cash used in operating activities:
Stock option compensation	643,024	535,196
Stock awards granted pursuant to stock incentive plans	$ 1,313,046	$ 1,392,465

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