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v3.20.4

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019
Reconciliation of net loss to net cash used in operating activities: |  |
Net loss | $ (10,092,363) | $ (11,818,652)
Stock option compensation to employees and directors | 3,922,719 | 3,560,883
Stock options and warrants issued to consultants | 214,741 | 198,421
Restricted stock award compensation to employee pursuant to stock incentive plan |  | 1,954,441
Amortization of patents |  | 418,750
Depreciation of property and equipment | 38,276 | 47,558
Loss on disposal of property and equipment | 148,084 |
Amortization of operating lease right-of-use asset | 51,881 |
Impairment in carrying amount of patent assets |  | 418,750
Change in operating assets and liabilities: |  |
Receivables | 64,296 | 271,700
Prepaid expenses and other current assets | (124,360) | (9,481)
Accounts payable | (353,449) | 3,805
Accrued expenses | 5,527 | 212,399
Operating lease liability | (51,023) |
Net cash used in operating activities | (6,175,671) | (4,741,426)
Cash flows from investing activities: |  |
Disbursements to acquire short-term investments in certificates of deposit | (5,010,000) | (3,850,000)
Proceeds from maturities of short-term investments in certificates of deposit | 4,720,000 | 3,500,000
Purchase of property and equipment | (15,791) | (175,457)
Net cash used in investing activities | (305,791) | (525,457)
Cash flows from financing activities: |  |
Proceeds from sale of common stock in at-the-market offering | 9,266,177 | 5,527,428
Proceeds from sale of common stock pursuant to employee stock purchase plan | 18,451 | 39,086
Proceeds from settlement of shareholder derivative complaint |  | 14,034
Proceeds from exercise of stock options and warrants | 122,270 | 122,070
Net cash provided by financing activities | 9,406,898 | 5,702,618
Net increase in cash and cash equivalents | 2,925,436 | 435,735
Cash and cash equivalents at beginning of year | 3,491,625 | 3,055,890
Cash and cash equivalents at end of year | 6,417,061 | 3,491,625
Supplemental cash flow information: |  |
Cash proceeds from interest income | 39,890 | 55,729
Supplemental disclosure of non-cash investing activity: |  |
Disposal of fully depreciated property and equipment |  | (6,343)
Supplemental disclosure of non-cash financing activity: |  |
Note receivable issued for settlement of shareholder derivative complaint |  | $ 31,236

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