XML 62 R29.htm IDEA: XBRL DOCUMENT v3.23.3

CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Assets
Cash equivalents, amortized cost	$ 56,514	$ 100,444	$ 94,570	$ 178,872
Marketable securities, amortized cost	75,647	207,923
Marketable securities, gross unrealized gains	1	28
Marketable securities, gross unrealized losses	(51)	(918)
Marketable securities, estimated fair value	75,597	207,033
Total cash equivalents and marketable securities, amortized cost	79,064	258,743
Total cash equivalents and marketable securities, gross unrealized gains	1	28
Total cash equivalents and marketable securities, gross unrealized losses	(51)	(918)
Total cash equivalents and marketable securities, estimated fair value	79,014	257,853
Money market funds
Assets
Cash equivalents, amortized cost	3,417	50,820
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, estimated fair value	3,417	50,820
Cash equivalents:
Assets
Cash equivalents, amortized cost	3,417	50,820
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, estimated fair value	3,417	50,820
U.S. government-sponsored entity debt securities
Assets
Marketable securities, amortized cost	28,655	18,710
Marketable securities, gross unrealized gains	0	0
Marketable securities, gross unrealized losses	(18)	(293)
Marketable securities, estimated fair value	28,637	18,417
Commercial paper securities
Assets
Marketable securities, amortized cost	18,901	101,336
Marketable securities, gross unrealized gains	0	22
Marketable securities, gross unrealized losses	(10)	(193)
Marketable securities, estimated fair value	18,891	101,165
Corporate debt securities
Assets
Marketable securities, amortized cost	1,379	11,760
Marketable securities, gross unrealized gains	0	0
Marketable securities, gross unrealized losses	0	(90)
Marketable securities, estimated fair value	1,379	11,670
Asset-backed securities
Assets
Marketable securities, amortized cost	8,429	24,970
Marketable securities, gross unrealized gains	0	2
Marketable securities, gross unrealized losses	0	(180)
Marketable securities, estimated fair value	8,429	24,792
U.S. treasury bills
Assets
Marketable securities, amortized cost	5,599	7,950
Marketable securities, gross unrealized gains	0	0
Marketable securities, gross unrealized losses	(18)	(12)
Marketable securities, estimated fair value	5,581	7,938
Certificates of deposit
Assets
Marketable securities, amortized cost	12,684	37,599
Marketable securities, gross unrealized gains	1	4
Marketable securities, gross unrealized losses	(5)	(142)
Marketable securities, estimated fair value	$ 12,680	37,461
Agency bonds
Assets
Marketable securities, amortized cost		5,598
Marketable securities, gross unrealized gains		0
Marketable securities, gross unrealized losses		(8)
Marketable securities, estimated fair value		$ 5,590

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:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=sgmo_USGovernmentSponsoredAgencyBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: