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Share-Based Payments - Schedule of Stock Option Activity (Details) - Precigen Stock Option Plans - $ / shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Number of Shares |  |  |  |
Balances at beginning of period (in shares) | 9,022,282 | 11,093,063 | 11,382,747 |
Granted (in shares) | 5,693,498 | 1,556,575 | 1,470,339 |
Exercised (in shares) | (30,061) | (19,887) | (45,159) |
Forfeited (in shares) | (976,324) | (1,236,326) | (929,596) |
Expired (in shares) | (2,453,499) | (2,371,143) | (785,268) |
Balances at period end (in shares) | 11,255,896 | 9,022,282 | 11,093,063 | 11,382,747
Weighted Average Exercise Price (usd per share) |  |  |  |
Balances at beginning of period (in usd per share) | $ 21.94 | $ 27.95 | $ 28.99 |
Granted (in usd per share) | 10.03 | 6.52 | 14.26 |
Exercised (in usd per share) | (3.88) | (3.17) | (6.59) |
Forfeited (in usd per share) | (15.47) | (24.92) | (21.48) |
Expired (in usd per share) | (26.53) | (38.53) | (26.25) |
Balances at period end (in usd per share) | $ 15.53 | 21.94 | $ 27.95 | $ 28.99
Additional Disclosures |  |  |  |
Exercisable at period end (in shares) | 5,437,667 |  |  |
Options exercisable, weighted average exercise price (in usd per share) | $ 19.61 | $ 24.89 |  |
Balances at period end, weighted average remaining contractual period | 7 years 3 months | 6 years 1 month 6 days | 6 years 9 months 21 days | 7 years 3 months 25 days
Exercisable at period end, weighted average remaining contractual period | 5 years 7 months 9 days |  |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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