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STOCKHOLDERS' EQUITY - Narrative (Details) - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |
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Jun. 30, 2024 | Apr. 08, 2024 | Mar. 26, 2024 | Mar. 21, 2024 | Dec. 31, 2022 | May 31, 2021 | Aug. 31, 2020 | Dec. 31, 2024 | Dec. 31, 2023 | May 31, 2024 | Jun. 30, 2023 | May 31, 2022 | Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  |  |  |  |  |  | 5,000,000 | 5,000,000 |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  |  |  | 0 | 0 |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  |  |  |  |  | 0 | 0 |  |  |  |
Common stock, shares authorized (in shares) | 960,000,000 |  |  |  |  |  |  | 960,000,000 | 960,000,000 | 640,000,000 | 640,000,000 |  | 320,000,000
Beginning balance (in shares) |  |  |  |  |  |  |  | 212,837,679 | 178,133,548 |  |  |  |
Common stock, par value (in dollars per share) |  |  | $ 0.01 |  |  |  |  | $ 0.01 | $ 0.01 |  |  |  |
Shares reserved for issuance of future awards (in shares) |  |  |  |  |  |  |  | 2,110,961 |  |  |  |  |
Stock option maximum term |  |  |  |  |  |  |  | 5 years 3 months 10 days |  |  |  |  |
Specified stockholder ownership percentage | 10.00% |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of common stock percent under stock incentive plans for specified stockholder | 110.00% |  |  |  |  |  |  |  |  |  |  |  |
Stock option maximum term for specified stockholder | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Share of common stock subject to a stock option or stock appreciation right (in shares) | 100.00% |  |  |  |  |  |  |  |  |  |  | 100.00% |
Intrinsic value of options exercised |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |
Restricted stock units awarded (in shares) |  |  |  |  |  |  |  | 11,783,300 |  |  |  |  |
Total payments for the employees' tax obligations to taxing authorities |  |  |  |  |  |  |  | $ 904,000 | $ 1,453,000 |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance (in shares) |  |  |  |  | 166,793,320 |  |  | 212,837,679 | 178,133,548 |  |  |  |
Issuance of common stock in at-the-market offering, net of offering expenses (in shares) |  |  |  |  |  |  |  |  | 8,249,261 |  |  |  |
Issuance of common stock upon exercise of pre-funded warrants (in shares) |  | 3,809,523 |  |  |  |  |  | 3,809,523 |  |  |  |  |
Pre Funded Common Stock Warrant |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Offering price of each common stock (in dollars per share) |  | $ 0.01 |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock units awarded (in shares) |  |  |  |  |  |  |  | 11,783,300 | 4,811,834 |  |  |  |
Grant date fair value per award of restricted stock units (in dollars per share) |  |  |  |  |  |  |  | $ 0.47 | $ 2.29 |  |  |  |
Aggregate fair value of RSUs vested in period |  |  |  |  |  |  |  | $ 10,500,000 | $ 17,800,000 |  |  |  |
Shares withheld from issuance in order to pay employee taxes (in shares) |  |  |  |  |  |  |  | 861,509 | 788,236 |  |  |  |
Restated 2018 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in capital shares reserved for future issuance (in shares) | 11,000,000 |  |  |  |  |  |  |  |  |  | 10,000,000 |  |
Shares reserved for issuance of future awards (in shares) |  |  |  |  |  |  |  | 38,800,000 |  |  |  |  |
2018 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved for issuance of future awards (in shares) |  |  |  |  |  |  |  | 18,826,554 |  |  |  |  |
Percent of fair value per share of common stock on option grant date | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Stock options expiration term | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Fixed ratio shares of common stock | 1.33 |  |  |  |  |  |  |  |  |  |  |  |
2010 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of fair value per share of common stock on option grant date |  |  |  |  |  | 85.00% |  |  |  |  |  |  |
Stock reserved for issuance under plan (in shares) |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |
Purchase plan offering period |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Purchase plan purchase period |  |  |  |  |  | 6 months |  |  |  |  |  |  |
Maximum | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options vesting period |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Maximum | 2018 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option maximum term | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Stock options vesting period | 4 years |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options vesting period |  |  |  |  |  |  |  | 2 years |  |  |  |  |
Minimum | 2018 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options vesting period | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Private Placement |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration received from sale of stock |  |  |  | $ 21,900,000 |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  | 24,761,905 |  |  |  |  |  |  |  |  |  |
Cash placement fees |  |  |  | 6.00% |  |  |  |  |  |  |  |  |
Net of placement fees |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |
Proceeds from other offering expenses |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |
Private Placement | Pre Funded Common Stock Warrant |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  | 28,571,428 |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction, per unit (in shares) |  |  | 1 |  |  |  |  |  |  |  |  |  |
Number of shares of common stock for each Common warrant (in shares) |  |  | 1 |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  | $ 0.83 |  |  |  |  |  |  |  |  |  |
Sangamo stock price (USD) (in dollars per share) |  |  | 0.01 |  |  |  |  |  |  |  |  |  |
Offering price of each common stock (in dollars per share) |  |  | $ 1.00 |  |  |  |  |  |  |  |  |  |
Private Placement | Common Warrant |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction, per unit (in shares) |  |  | 1 |  |  |  |  |  |  |  |  |  |
Number of shares of common stock for each Common warrant (in shares) |  |  | 1 |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  | $ 0.84 |  |  |  |  |  |  |  |  |  |
Warrant or right outstanding, exercisable, period after issuance |  |  |  | 6 months |  |  |  |  |  |  |  |  |
Term of warrants |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |  |
Private Placement | Pre Funded Common Stock Warrant |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of new stock issued during the period (in shares) |  |  | 3,809,523 |  |  |  |  |  |  |  |  |  |
Jefferies LLC | ATM Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock offering program, maximum value |  |  |  |  |  |  | $ 150,000,000 |  |  |  |  |  |
Stock offering program, increase to aggregate offering price |  |  |  |  | $ 175,000,000 |  |  |  |  |  |  |  |
Amount remained available |  |  |  |  |  |  |  | $ 186,900,000 |  |  |  |  |
Issuance of common stock in at-the-market offering, net of offering expenses (in shares) |  |  |  |  |  |  |  | 3,638,740 | 8,249,261 |  |  |  |
Consideration received from sale of stock |  |  |  |  |  |  |  | $ 7,100,000 | $ 15,100,000 |  |  |  |

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