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v3.22.1

Consolidated Statements of Cash Flows - USD ($) | 3 Months Ended
--- | ---
Feb. 28, 2022 | Feb. 28, 2021
Cash flows from operating activities: |  |
Net income | $ 832,047 | $ 693,590
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization expense | 396,112 | 72,489
Change in fair value of contingent consideration | (116,433) | 152,394
Losses on marketable securities | 8,642 | 2,576
Compensatory element of stock options | 31,896 | 84,818
Provision for doubtful accounts | 164,388 | 90,854
Amortization of debt issuance costs | 6,389 | 19,682
Amortization of operating lease right-of-use asset | 76,604 | 66,620
Changes in assets and liabilities: |  |
Accounts receivable | (62,780) | 593,114
Prepaid expenses | 20,687 | 100,975
Inventory | 33,636 | 109,928
Other current assets | 227,666 | (70,028)
Deposits and other assets, net | (17,594) | (98,675)
Accounts payable | 357,959 | (97,258)
Accrued expenses | (953,433) | 559,087
Operating lease liability | (76,255) | (65,504)
Deferred revenue | 577,228 | 447,380
Net cash provided by operating activities | 1,506,759 | 2,662,042
Cash flows from investing activities: |  |
Purchases of property and equipment | (647,637) | (11,978)
Purchase of patent option agreement |  | (150,000)
Payment of Duke license agreement | (5,000,000) |
Purchases of marketable securities | (405,599) |
Net cash used in investing activities | (6,053,236) | (161,978)
Cash flows from financing activities: |  |
Treasury stock purchases | (828,980) |
Repayments of note payable | (775,000) | (1,775,000)
Proceeds from the exercise of stock options | 32,000 | 191,622
Net cash used in financing activities | (1,571,980) | (1,583,378)
(Decrease) increase in cash and cash equivalents | (6,118,457) | 916,686
Cash and cash equivalents - beginning of period | 8,263,088 | 10,361,125
Cash and cash equivalents - end of period | $ 2,144,631 | 11,277,811
Supplemental non-cash operating activities: |  |
Lease liability arising from right-of-use asset |  | 780,070
Patent option agreement credit to purchase of patents and licenses |  | 500,000
Liabilities incurred for the purchase of patents and licenses |  | $ 15,242,161

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