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Note 9 - Stockholders' Equity - Summary of Shares to be Issued (Details) - shares | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Shares-to-be-issued, outstanding (in shares) | 2,440,878 | 2,375,760
Granted in current period (in shares) | 33,238 | 102,768
Issued in current period (in shares) | (65,965) | (11,995)
Shares-to be issued outstanding (in shares) | 2,408,151 | 2,466,533

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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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration