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Note 8 - Stockholders' Equity - Warrants (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
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) | 1 year 3 months | 1 year 6 months
Outstanding, intrinsic value | $ 580,142 | $ 1,187,546
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 |
Outstanding , number of shares (in shares) | 4,268,221 | 4,268,221
Outstanding , weighted average exercise price (in dollars per share) | $ 2.18 | $ 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
Name: | mlss_ClassOfWarrantOrRightExercisedDuringPeriodExercisePrice
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
Name: | mlss_ClassOfWarrantOrRightIssuedDuringPeriod
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
Name: | mlss_ClassOfWarrantOrRightIssuedDuringPeriodExercisePrice
Namespace Prefix: | mlss_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the weighted average remaining term of warrants and rights outstanding, + References No definition available. + Details
Name: | mlss_WarrantsAndRightsOutstandingWeightedAverageRemainingTerm
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 -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant