Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
6 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Cash flows from operating activities:    
Net loss $ (5,274,565) $ (7,541,543)
Stock option compensation to employees and directors 2,019,211 2,024,664
Stock options and warrants issued to consultants 112,209 92,509
Restricted stock award compensation to employee pursuant to stock incentive plan 1,954,441
Depreciation of property and equipment 29,418 18,108
Amortization of operating lease right-of-use asset, net of lease payments 546
Amortization of patents 376,875
Impairment in carrying amount of patent assets 418,750
Change in operating assets and liabilities:    
Receivables 34,189 (489,963)
Prepaid expenses and other current assets 68,720 51,219
Accounts payable (415,039) 135,908
Accrued expenses (45,343) 194,742
Net cash used in operating activities (3,470,654) (2,764,290)
Cash flows from investing activities:    
Disbursements to acquire short-term investments in certificates of deposit (2,620,000) (1,000,000)
Proceeds from maturities of short-term investments in certificates of deposit 2,350,000 250,000
Purchase of property and equipment (15,791) (175,457)
Net cash used in investing activities (285,791) (925,457)
Cash flows from financing activities:    
Net proceeds from sale of common stock in at-the-market offering 3,033,835 4,357,803
Proceeds from sale of common stock pursuant to employee stock purchase plan 15,452 18,560
Proceeds from exercise of stock options 103,730 79,800
Net cash provided by financing activities 3,153,017 4,456,163
Net (decrease) increase in cash and cash equivalents (603,428) 766,416
Cash and cash equivalents at beginning of period 3,491,625 3,055,890
Cash and cash equivalents at end of period 2,888,197 3,822,306
Supplemental disclosure of non-cash investing and financing activities:    
Operating lease right-of-use asset (106,221)
Operating lease liability $ 106,299