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Consolidated Statements of Cash Flows - USD ($) | 3 Months Ended
--- | ---
Feb. 29, 2024 | Feb. 28, 2023
Cash flows from operating activities: |  |
Net income | $ 556,241 | $ 766,812
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization expense | 86,047 | 369,950
Change in fair value of contingent consideration | (5,176) | (164,701)
Unrealized (gains) losses on marketable securities | (274,971) | 3,681
Unrealized loss on interest rate swap contract | 45,288 | 0
Compensatory element of stock options | 307,355 | 313,174
Provision for doubtful accounts | 288,760 | 186,904
Amortization of debt issuance costs | 5,348 | 5,444
Amortization of operating lease right-of-use asset | 75,135 | 79,324
Changes in assets and liabilities: |  |
Accounts receivable | (439,413) | (665,419)
Prepaid expenses | 80,112 | (13,587)
Inventory | 49,856 | 230,459
Other current assets | 11,640 | 5,796
Deposits and other assets, net | (10,616) | (18,339)
Accounts payable | (931,007) | 221,749
Accrued expenses | (1,253,911) | (510,907)
Operating lease liability | (54,682) | (80,048)
Deferred revenue | 1,107,129 | 913,634
Net cash (used in) from operating activities | (356,865) | 1,643,926
Cash flows from investing activities: |  |
Purchases of property and equipment | (457,722) | (375,600)
Purchases of marketable securities | (743,811) | (1,017,738)
Sale of marketable securities | 860,484 | 191,400
Net cash used in investing activities | (341,049) | (1,201,938)
Cash flows from financing activities: |  |
Treasury stock purchases | (170,376) | (243,201)
Repayments of note payable | (40,665) | (29,646)
Repayment of line of credit | (200,000) | (500,000)
Proceeds from line of credit | 950,000 | 0
Net cash provided by (used in) financing activities | 538,959 | (772,847)
Decrease in cash and cash equivalents | (158,955) | (330,859)
Cash and cash equivalents - beginning of period | 406,067 | 1,703,958
Cash and cash equivalents - end of period | 247,112 | 1,373,099
Supplemental investing activities: |  |
Construction costs payable | 219,748 | 536,707
Duke license agreement payable | 533,333 | 0
Supplemental non-cash operating activities: |  |
Interest | 443,829 | 441,336
Income taxes | $ 57,630 | $ 33,072

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