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Note 8 - Stockholders' Equity - Summary of Shares to be Issued (Details) - shares | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Shares-to-be-issued, outstanding (in shares) | 2,066,343 | 2,440,878
Granted in current period (in shares) | 108,148 | 33,238
Issued in current period (in shares) | 0 | (65,965)
Shares-to be issued outstanding (in shares) | 2,174,491 | 2,408,151

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- Definition Number of shares granted pursuant to the terms of a deferred compensation arrangement. + References No definition available. + Details
Name: | mlss_DeferredCompensationArrangementWithIndividualSharesGranted
Namespace Prefix: | mlss_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The maximum number of shares authorized for issuance under the deferred compensation arrangement as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares issued pursuant to the terms of a deferred compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (l) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration