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Condensed Consolidated Statements of Cash Flows - USD ($) | 9 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Operating activities: |  |
Net (loss) income | $ (840,542) | $ 8,579,052
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |
(Recovery of) Provision for credit losses | (4,105) | 40,277
Depreciation of equipment and leasehold improvements | 142,046 | 186,168
Accretion of discount on treasury securities | (313,704) | (110,632)
Noncash operating lease expense | 5,752 | 6,391
Stock-based compensation expense | 119,937 | 243,688
Change in cash surrender value of life insurance | (156,644) | (147,012)
Provision for deferred compensation | 113,387 | 62,783
Loss on disposal of fixed assets |  | 2,263
Net changes in operating assets and liabilities: |  |
Accounts receivable | 186,567 | 570,932
Inventories | 1,762,436 | 1,552,103
Prepaid expenses and other current assets | (114,762) | (233,792)
Interest receivable | (65,425) | (56,014)
Income taxes receivable | (123,877) |
Income taxes payable | (81,956) | 247,170
Accounts payable | (51,808) | (442,850)
Accrued liabilities | (440,742) | 324,507
Deferred revenue | (153,118) | (208,308)
Net cash (used in) provided by operating activities | (16,558) | 10,616,726
Investing activities: |  |
Purchase of equipment and leasehold improvements | (460,960) | (68,242)
Life insurance premiums paid | (81,744) | (87,994)
Proceeds from the maturity of treasury securities | 14,331,000 |
Purchases of treasury securities | (13,985,921) | (16,884,358)
Net cash used in investing activities | (197,625) | (17,040,594)
Financing activities: |  |
Proceeds from exercise of stock options | 35,800 | 137,330
Net cash provided by financing activities | 35,800 | 137,330
Net (decrease) in cash and cash equivalents | (178,383) | (6,286,538)
Cash and cash equivalents at beginning of period | 3,091,062 | 9,208,170
Cash and cash equivalents at end of period | 2,912,679 | 2,921,632
Supplemental cash flow information: |  |
Cash paid for income taxes | $ 128,463 | $ 216,759

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