XML 83 R71.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Segment, Concentration and Geographical Information - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2023 location segment | Dec. 31, 2022 | Dec. 31, 2021 location
Revenue, Major Customer [Line Items] |  |  |
Number of primary business units | segment | 1 |  |
Number of geographic locations | location | 2 |  | 2
Customer Concentration Risk | Revenue | One Customer |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 41.00% | 40.00% |
Customer Concentration Risk | Revenue | Two Customer |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 35.00% | 38.00% |
Customer Concentration Risk | Revenue | Three Customer |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 13.00% |  |
Customer Concentration Risk | Revenue | U.S. Tier 1 Customer Agreement |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 36.00% | 33.00% |
Customer Concentration Risk | Accounts Receivable | One Customer |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 38.00% | 40.00% |
Customer Concentration Risk | Accounts Receivable | Two Customer |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 37.00% | 26.00% |
Customer Concentration Risk | Accounts Receivable | Three Customer |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 11.00% | 17.00% |
Supplier Concentration Risk | Service provider one | Purchase |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 16.00% | 19.00% |
Supplier Concentration Risk | Service provider one | Accounts Payable |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration percentage | 33.00% | 36.00% |

X
- Definition Number of geographic locations where the company operates. + References No definition available. + Details
Name: | smsi_NumberOfGeographicLocation
Namespace Prefix: | smsi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-21 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-20 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-18 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-20 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
Name: | us-gaap_NumberOfOperatingSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=smsi_OneCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=smsi_TwoCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=smsi_ThreeCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=smsi_U.S.Tier1CustomerAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_SupplierConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis=smsi_ServiceProviderOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_CostOfGoodsTotalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_LiabilitiesTotalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |