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Note 6 - Investment in and Transactions With Equity Investees (Details Textual) ¥ in Millions			3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Oct. 08, 2021 USD ($)	Oct. 08, 2021 CNY (¥)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2014 USD ($)
Income (Loss) from Equity Method Investments			$ 0	$ (69,905)		$ 0	$ (164,461)
Milestone China [Member]
Equity Method Investments										$ 1,000,000
Equity Method Investment, Ownership Percentage										40.00%
Financing Receivable, after Allowance for Credit Loss, Total								$ 2,800,000
Proceeds from Collection of Finance Receivables								$ 950,000
Contract with Customer, Liability, Total			100,000		$ 100,000	100,000			$ 89,000
Income (Loss) from Equity Method Investments			(0)	(70,000)		(0)	(164,000)
Milestone China [Member] | Accounts Receivable from Related Parties [Member]
Equity Method Investment, Deferred Intercompany Profit (Loss)			$ 0		0	0			$ 0
Milestone China [Member] | Instruments [Member]
Revenue from Related Parties				$ 360,000	$ 0	$ 370,000	$ 1.4
Milestone Beijing [Member] | Milestone China [Member]
Equity Method Investment, Ownership Percentage										75.00%
Anhui [Member]
Equity Method Investment, Ownership Percentage									28.40%
Anhui [Member] | Milestone China [Member] | Chief Executive Officer [Member]
Equity Method Investment, Ownership Percentage	28.40%	28.40%
Proceeds from Sale of Equity Method Investments	$ 440,351	¥ 2,840

X

- Definition

The aggregate amount of deferred intercompany profits and losses on transactions between the Entity and unconsolidated subsidiaries (including certain corporate joint ventures, and noncontrolled corporations), accounted for under the equity method of accounting,as of the balance sheet date.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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