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Note D - Notes Receivable (Details Textual) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 02, 2018 | Apr. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2014
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase |  |  |  | $ (250,000) | $ 250,000 |
Milestone China [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 40.00%
Financing Receivable, Net, Total |  |  |  | $ 2,800,000 |  |
Equity Method Investment, Deferred Gain on Sale |  |  | $ 1,400,000 |  |  |
Milestone China [Member] | Sale of Variable Interest Entity's Shares [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 40.00% |  |  |
Option to Repurchase, Period |  |  | 10 years |  |  |
Price for Shares of Variable Interest Entity Interest Sold |  |  | $ 1,400,000 |  |  |
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase |  |  | 125,000 |  |  |
Financing Receivable, Net, Total |  |  | 1,275,000 |  |  |
Note Receivable, Quarterly Installment Amount |  |  | 125,000 |  |  |
Option to Repurchase Variable Interest Entity Shares, Purchase Price |  |  | $ 1,400,000 |  |  |
Option to Repurchase Variable Entity Shares at Specified Purchase Price, Period |  |  | 2 years |  |  |
Equity Method Investment, Deferred Gain on Sale |  |  | $ 1,400,000 |  |  |
Return Obligation, Amount Repaid | $ 250,000 |  |  |  |  |
Notes Receivable, Reversal Amount |  | $ 1,150,000 |  |  |  |
Equity Method Investment, Reversal of Deferred Gain on Sale |  | 1,400,000 |  |  |  |
Termination Agreement, Gain (Loss) on Transaction |  | $ 0 |  |  |  |

X
- Definition Represents the amount deferred gain on sale that was derecognized during the period. + References No definition available. + Details
Name: | mlss_EquityMethodInvestmentReversalOfDeferredGainOnSale
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of quarterly installment amount in related to the note receivable pursuant to the agreement. + References No definition available. + Details
Name: | mlss_NoteReceivableQuarterlyInstallmentAmount
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of a Note Receivable that was derecognized. + References No definition available. + Details
Name: | mlss_NotesReceivableReversalAmount
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The period of option to repurchase pursuant to the agreement. + References No definition available. + Details
Name: | mlss_OptionToRepurchasePeriod
Namespace Prefix: | mlss_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period to repurchase the variable entity shares at a specified purchase price under the agreement. + References No definition available. + Details
Name: | mlss_OptionToRepurchaseVariableEntitySharesAtSpecifiedPurchasePricePeriod
Namespace Prefix: | mlss_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase price under the agreement to repurchase the variable interest entity shares within the first two years. + References No definition available. + Details
Name: | mlss_OptionToRepurchaseVariableInterestEntitySharesPurchasePrice
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The price for shares of variable interest entity interest sold pursuant the agreement. + References No definition available. + Details
Name: | mlss_PriceForSharesOfVariableInterestEntityInterestSold
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of cash inflow from the sale of variable interest entity shares with agreement to repurchase. + References No definition available. + Details
Name: | mlss_ProceedsFromSaleOfVariableInterestEntitySharesWithAgreementToRepurchase
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of the return obligation repaid related to the termination agreement. + References No definition available. + Details
Name: | mlss_ReturnObligationAmountRepaid
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of gain (loss) related to the termination agreement transaction. + References No definition available. + Details
Name: | mlss_TerminationAgreementGainLossOnTransaction
Namespace Prefix: | mlss_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents disclosure of the amount of gain which has been deferred as the result of the sale of a business or operating assets to a highly leveraged entity which deferred gain has been reflected in the accompanying statement of financial position as reduction from the related asset. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |