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Note 3 - Summary of Significant Accounting Policies (Details Textual) | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 USD ($) | Jun. 30, 2024 USD ($) shares | Jun. 30, 2023 shares | Jun. 30, 2024 USD ($) shares | Jun. 30, 2023 shares
Number of Operating Segments |  |  |  | 2 |
Cash, Uninsured Amount |  | $ 5,200,000 |  | $ 5,200,000 |
Marketable Securities, Current | $ 2,976,573 | 0 |  | 0 |
Accounts Receivable, Allowance for Credit Loss | 10,000 | $ 10,000 |  | $ 10,000 |
Weighted Average Number of Shares Outstanding, Basic (in shares) | shares |  | 79,966,833 | 72,333,656 | 80,412,397 | 72,048,223
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares |  |  |  | 3,128,652 | 4,142,155
Marketable Securities | 2,976,573 |  |  |  |
US Treasury Securities [Member] |  |  |  |  |
Marketable Securities, Current | 3,000,000 |  |  |  |
Money Market Funds [Member] |  |  |  |  |
Cash Equivalents, at Carrying Value | 3,000,000 | $ 5.8 |  | $ 5.8 |
Milestone Medical Inc. [Member] |  |  |  |  |
Payments to Acquire Additional Interest in Subsidiaries | $ 214,000 |  |  |  |

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