XML 47 R30.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash equivalents, at carrying value, total | $ 54,417 | $ 45,204 | $ 78,241 | $ 100,444
Marketable securities, amortized cost |  | 35,564 |  |
Marketable securities, gross unrealized gains |  | 241 |  |
Marketable securities, gross unrealized losses |  | (7) |  |
Marketable securities, estimated fair value |  | 35,798 |  |
Total cash equivalents and marketable securities, amortized cost |  | 38,072 |  |
Total cash equivalents and marketable securities, gross unrealized gains |  | 241 |  |
Total cash equivalents and marketable securities, gross unrealized losses |  | (7) |  |
Total cash equivalents and marketable securities, estimated fair value |  | 38,306 |  |
Money market funds |  |  |  |
Assets |  |  |  |
Cash equivalents, at carrying value, total | 8,956 | 2,508 |  |
Cash equivalents, gross unrealized gains | 0 | 0 |  |
Cash equivalents, gross unrealized losses | 0 | 0 |  |
Cash equivalents, estimated fair value | 8,956 | 2,508 |  |
Cash equivalents: |  |  |  |
Assets |  |  |  |
Cash equivalents, at carrying value, total | 8,956 | 2,508 |  |
Cash equivalents, gross unrealized gains | 0 | 0 |  |
Cash equivalents, gross unrealized losses | 0 | 0 |  |
Cash equivalents, estimated fair value | $ 8,956 | 2,508 |  |
U.S. government-sponsored entity debt securities |  |  |  |
Assets |  |  |  |
Marketable securities, amortized cost |  | 22,347 |  |
Marketable securities, gross unrealized gains |  | 219 |  |
Marketable securities, gross unrealized losses |  | 0 |  |
Marketable securities, estimated fair value |  | 22,566 |  |
Commercial paper securities |  |  |  |
Assets |  |  |  |
Marketable securities, amortized cost |  | 2,825 |  |
Marketable securities, gross unrealized gains |  | 2 |  |
Marketable securities, gross unrealized losses |  | (1) |  |
Marketable securities, estimated fair value |  | 2,826 |  |
Corporate debt securities |  |  |  |
Assets |  |  |  |
Marketable securities, amortized cost |  | 1,399 |  |
Marketable securities, gross unrealized gains |  | 6 |  |
Marketable securities, gross unrealized losses |  | 0 |  |
Marketable securities, estimated fair value |  | 1,405 |  |
Asset-backed securities |  |  |  |
Assets |  |  |  |
Marketable securities, amortized cost |  | 2,368 |  |
Marketable securities, gross unrealized gains |  | 9 |  |
Marketable securities, gross unrealized losses |  | 0 |  |
Marketable securities, estimated fair value |  | 2,377 |  |
U.S. treasury bills |  |  |  |
Assets |  |  |  |
Marketable securities, amortized cost |  | 5,599 |  |
Marketable securities, gross unrealized gains |  | 0 |  |
Marketable securities, gross unrealized losses |  | (6) |  |
Marketable securities, estimated fair value |  | 5,593 |  |
Certificates of deposit |  |  |  |
Assets |  |  |  |
Marketable securities, amortized cost |  | 1,026 |  |
Marketable securities, gross unrealized gains |  | 5 |  |
Marketable securities, gross unrealized losses |  | 0 |  |
Marketable securities, estimated fair value |  | $ 1,031 |  |

X
- Definition Cash and cash equivalents accumulated gross unrealized gain before tax. + References No definition available. + Details
Name: | sgmo_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | sgmo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash and cash equivalents accumulated gross unrealized loss before tax. + References No definition available. + Details
Name: | sgmo_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | sgmo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash equivalents and available for sale securities. + References No definition available. + Details
Name: | sgmo_CashEquivalentsAndAvailableForSaleSecurities
Namespace Prefix: | sgmo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash equivalents and available for Sale Securities Amortized Cost + References No definition available. + Details
Name: | sgmo_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | sgmo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash equivalents and available for sale securities, gross unrealized gain, before tax. + References No definition available. + Details
Name: | sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedGainBeforeTax
Namespace Prefix: | sgmo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash equivalents and available for sale securities, gross unrealized loss, before Tax + References No definition available. + Details
Name: | sgmo_CashEquivalentsAndAvailableForSaleSecuritiesGrossUnrealizedLossBeforeTax
Namespace Prefix: | sgmo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-4 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |