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FAIR VALUE MEASUREMENTS - (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Summary of Fair Value Measurements of Cash Equivalents, Available-for-Sale Marketable Securities and Free Share Asset/Liability

The fair value measurements of the Company’s cash equivalents, marketable securities and the free shares asset are identified at the following levels within the fair value hierarchy (in thousands):

			September 30, 2020
			Fair Value Measurements
			Total						Level 1						Level 2						Level 3
Assets:
Cash equivalents:
Money market funds			$	172,508					$	172,508					$	—					$	—
Commercial paper securities			5,999						—						5,999						—
Total			178,507						172,508						5,999						—
Marketable securities:
Commercial paper securities			238,398						—						238,398						—
Corporate debt securities			122,484						—						122,484						—
Asset-backed securities			13,066						—						13,066						—
U.S. government-sponsored entity debt securities			61,247						—						61,247						—
Total			435,195						—						435,195						—
Total cash equivalents and marketable securities			$	613,702					$	172,508					$	441,194					$	—
Free shares asset			$	129					$	—					$	—					$	129

			December 31, 2019
			Fair Value Measurements
			Total						Level 1						Level 2						Level 3
Assets:
Cash equivalents:
Money market funds			$	30,496					$	30,496					$	—					$	—
Commercial paper securities			2,999						—						2,999						—
Total			33,495						30,496						2,999						—
Marketable securities:
Commercial paper securities			155,368						—						155,368						—
Corporate debt securities			95,017						—						95,017						—
U.S. government-sponsored entity debt securities			53,493						—						53,493						—
Total			303,878						—						303,878						—
Total cash equivalents and marketable securities			$	337,373					$	30,496					$	306,877					$	—
Free shares asset			$	236					$	—					$	—					$	236

Summary of Estimated Fair Value of Free Shares Valuation Assumptions

Free Shares valuation assumptions						September 30, 2020						December 31, 2019
Sangamo stock price (USD)						$	10.31					$	8.68
Sangamo France stock price (EUR)						€	2.55					€	2.14
EUR / USD exchange rate						0.84						0.91
Estimated correlation Sangamo and Sangamo France stock prices						100.0%						100.0%
Sangamo stock price (USD) volatility estimate						65.7%						72.5%
Sangamo France stock price (EUR) volatility estimate						65.7%						72.5%
EUR / USD exchange rate volatility estimate						6.4%						6.6%
Risk free rate and cost of debt by expected exercise date						Varies						Varies

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- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2C
-URI http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- References

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