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Note 6 - Stockholders' Equity - Warrants (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
Outstanding, number of shares (in shares) | 4,268,221 |
Outstanding, weighted average exercise price (in dollars per share) | $ 2.18 |
Outstanding, weighted average remaining life (Year) | 7 months 6 days | 6 months
Outstanding, Intrinsic value | $ 116,549 | $ 0
Issued, number of shares (in shares) | 0 |
Issued, weighted average exercise price (in dollars per share) | $ 0 |
Exercised, number of shares (in shares) | 0 |
Exercised, weighted average exercise price (in dollars per share) | $ 0 |
Expired or cancelled, number of shares (in shares) | (3,953,649) |
Expired or cancelled, weighted average exercise price (in dollars per share) | $ 0 |
Outstanding and exercisable at June 30, 2023 (in shares) | 314,572 | 4,268,221
Outstanding and exercisable at June 30, 2023 (in dollars per share) | $ 0.50 | $ 2.18

X
- Definition The number of warrants or rights exercised during period. + References No definition available. + Details
Name: | mlss_ClassOfWarrantOrRightExercisedDuringPeriod
Namespace Prefix: | mlss_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share of warrants or rights exercised during period. + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights expired or cancelled during period. + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share of warrants or rights expired or cancelled during period. + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights issued during period. + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share of warrants or rights issued during period. + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Intrinsic value of outstanding warrants. + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the weighted average remaining term of warrants and rights outstanding, + References No definition available. + Details
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Namespace Prefix: | mlss_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 + Details
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Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant