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Note 8 - Stockholders' Equity - Assumptions Used to Value Warrants at Grant Date (Details)	Mar. 31, 2020
Measurement Input, Expected Term [Member] | The 2016 Warrants [Member]
Warrants, measurement input	5
Measurement Input, Expected Term [Member] | The 2019 Warrants [Member]
Warrants, measurement input	4.9
Measurement Input, Price Volatility [Member] | The 2016 Warrants [Member]
Warrants, measurement input	0.85
Measurement Input, Price Volatility [Member] | The 2019 Warrants [Member]
Warrants, measurement input	0.85
Measurement Input, Exercise Price [Member] | The 2016 Warrants [Member]
Warrants, measurement input	0.5
Measurement Input, Exercise Price [Member] | The 2019 Warrants [Member]
Warrants, measurement input	0.5
Measurement Input, Risk Free Interest Rate [Member] | The 2016 Warrants [Member]
Warrants, measurement input	0.025
Measurement Input, Risk Free Interest Rate [Member] | The 2019 Warrants [Member]
Warrants, measurement input	0.0223
Measurement Input, Weighted Average of Shares Granted, Fair Value [Member] | The 2016 Warrants [Member]
Warrants, measurement input	0.22
Measurement Input, Weighted Average of Shares Granted, Fair Value [Member] | The 2019 Warrants [Member]
Warrants, measurement input	0.19
Measurement Input, Number of Shares Granted [Member] | The 2016 Warrants [Member]
Warrants, measurement input	1,749,171

X

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=mlss_The2016WarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=mlss_The2019WarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=mlss_MeasurementInputWeightedAverageOfSharesGrantedFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=mlss_MeasurementInputNumberOfSharesGrantedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: