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Consolidated Statements of Cash Flows (USD $) | 9 Months Ended
--- | ---
Aug. 31, 2013 | Aug. 31, 2012
Cash flows from operating activities: |  |
Net income (loss) | $ 194,782 | $ (5,454,090)
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |
Depreciation and amortization expense | 300,311 | 311,959
Abandonment of patents | 378,837 |
Loss on sale of property and equipment | 44,428 | 7,210
Compensatory element of stock options | 225,177 | 1,073,536
Provision for doubtful accounts | 583,182 | 530,655
Equity in losses of affiliate | 115,475 | 116,114
Loss on extinguishment of revenue sharing agreements |  | 1,595,606
Deferred income tax expense |  | 1,718,919
Changes in assets and liabilities: |  |
Accounts and notes receivable | (319,521) | (418,359)
Prepaid expenses and other current assets | 136,719 | 119,318
Deposits and other assets, net | 28,400 | 15,001
Accounts payable | 34,929 | 575,609
Accrued expenses | (1,232,887) | (173,728)
Deferred consulting obligation |  | (72,183)
Deferred revenue | 353,993 | 94,029
Net cash provided by operating activities | 843,825 | 39,596
Cash flows from investing activities: |  |
Restricted cash held in escrow | 1,156,030 | 51,502
Purchases of property and equipment | (239,381) | (137,678)
Purchases of marketable securities and other investments | (18,480) | (14,200)
Proceeds from sale of marketable securities and other investments |  | 1,008,404
Investments in patents | (34,525) | (20,385)
Net cash provided by investing activities | 863,644 | 887,643
Cash flows from financing activities: |  |
Extinguishment of revenue sharing agreements |  | (3,054,000)
Treasury stock purchases | (672,066) | (1,470,726)
Proceeds from the exercise of stock options | 14,950 |
Net cash used in financing activities | (657,116) | (4,524,726)
Increase (decrease) in cash and cash equivalents | 1,050,353 | (3,597,487)
Cash and cash equivalents - beginning of period | 2,677,382 | 6,305,095
Cash and cash equivalents - end of period | $ 3,727,735 | $ 2,707,608

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X
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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X
- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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