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v3.22.2

Consolidated Statements of Cash Flows - USD ($) | 6 Months Ended
--- | ---
May 31, 2022 | May 31, 2021
Cash flows from operating activities: |  |
Net income | $ 1,466,766 | $ 1,864,219
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization expense | 760,759 | 391,218
Change in fair value of contingent consideration | (152,538) | (279,205)
Losses on marketable securities | 26,830 | 15,088
Compensatory element of stock options | 149,358 | 152,572
Provision for doubtful accounts | 399,953 | 105,279
Amortization of debt issuance costs | 9,777 | 35,072
Amortization of operating lease right-of-use asset | 153,876 | 136,116
Changes in assets and liabilities: |  |
Accounts receivable | (296,934) | 1,002,125
Prepaid expenses | (11,217) | 261,691
Inventory | 190,803 | 108,414
Other current assets | (133,566) | (61,299)
Deposits and other assets, net | (237,521) | (113,564)
Accounts payable | 232,778 | 278,800
Accrued expenses | (982,399) | (1,407,076)
Operating lease liability | (154,035) | (133,259)
Deferred revenue | 2,031,279 | 1,842,959
Net cash provided by operating activities | 3,453,969 | 4,199,150
Cash flows from investing activities: |  |
Purchases of property and equipment | (954,607) | (22,272)
Payment of Duke license agreement | (5,000,000) | (5,106,224)
Purchases of marketable securities | (1,142,212) | 0
Sale of Marketable Securities | 1,127,669 | (0)
Net cash used in investing activities | (5,969,150) | (5,128,496)
Cash flows from financing activities: |  |
Treasury stock purchases | (1,425,455) | 0
Repayments of note payable | (1,550,000) | (2,550,000)
Proceeds from the exercise of stock options | 32,000 | 1,066,290
Net cash used in financing activities | (2,943,455) | (1,483,710)
Decrease in cash and cash equivalents | (5,458,636) | (2,413,056)
Cash and cash equivalents - beginning of period | 8,263,088 | 10,361,125
Cash and cash equivalents - end of period | 2,804,452 | 7,948,069
Supplemental non cash operating activities |  |
Lease Liability Arising from Right-of-Use Asset |  | 904,691
Patent Option Agreement Credit to Purchase of Patents and Licenses |  | 500,000
Liabilities Incurred for the Purchase of Patents and Licenses |  | 11,258,083
Supplemental financing activities: |  |
Stock issued for the purchase of patents and licenses | 0 | 3,585,172
Supplemental cash flow information |  |
Interest | 483,641 | 516,000
Income Taxes | $ 756,133 | $ 1,901,025

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