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Equity Transactions - Additional Information (Detail) (USD $) | 0 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 15, 2014 | Dec. 31, 2014
Class of Stock [Line Items] |  |
Gross proceeds before deduction commissions and other expenses | $ 5,600,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement |
Cash from issuance of common stock, net of offering costs |  | 5,242,000 us-gaap_ProceedsFromIssuanceOfCommonStock
Private Placement [Member] |  |
Class of Stock [Line Items] |  |
Common stock, issued and sold to investors | 6,845,830 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
Common stock, price per share | $ 0.816 us-gaap_SharesIssuedPricePerShare / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
Offering cost related to the transaction | 400,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
Commission | 200,000 smsi_CommissionOnSaleOfCommonStock / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
Legal and other expenses | 200,000 smsi_LegalAndOtherExpenses / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
Cash from issuance of common stock, net of offering costs | $ 5,200,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |

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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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