XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.20.2

Net Loss Per Share Attributable to Common Stockholders - Summary of Dilutive Common Shares were Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Total dilutive common shares excluded from calculation of diluted net loss per share | 3,956,522 | 3,047,526 | 3,956,522 | 3,047,526
Shares Subject to Options to Purchase Common Stock |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Total dilutive common shares excluded from calculation of diluted net loss per share | 1,806,493 | 1,819,292 | 1,806,493 | 1,819,292
Unvested Restricted Stock Units |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Total dilutive common shares excluded from calculation of diluted net loss per share | 2,150,000 | 128,000 | 2,150,000 | 128,000
Shares Subject to Warrants to Purchase Common Stock |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Total dilutive common shares excluded from calculation of diluted net loss per share | 29 | 956 | 29 | 956
Shares Subject to Term Debt Optional Conversion into Common Stock |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Total dilutive common shares excluded from calculation of diluted net loss per share |  | 1,099,278 |  | 1,099,278

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=sonm_SharesSubjectToOptionsToPurchaseCommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=sonm_UnvestedRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=sonm_SharesSubjectToWarrantsToPurchaseCommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=sonm_SharesSubjectToTermDebtOptionalConversionIntoCommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |