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Consolidated Statements of Cash Flows (Parenthetical) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 USD ($)
Statement Of Cash Flows [Abstract] |
Related party long-term notes payable issuance costs | $ 83
Long-term notes payable issuance costs | $ 83

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- Definition Debt issuance costs to related party. + References No definition available. + Details
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Namespace Prefix: | smsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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