The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
-SubTopic 730
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

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License Agreement - Additional Information (Detail) - GREENLIGHT BIOSCIENCES HOLDINGS, PBC [Member] - USD ($)	1 Months Ended		3 Months Ended		12 Months Ended
	Jan. 31, 2021	Aug. 31, 2020	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Development Costs, Period Cost					$ 500,000
Research and Development Expense			$ 300,000	$ 1,700,000
First Non Exclusive License [Member]
License Fee		$ 1,500,000
Second Non Exclusive License [Member]
License Fee		1,800,000
Third Non Exclusive License [Member]
License Fee		2,800,000
Acuitas Therapeutics Inc [Member]
Technology Access Fee		800,000
Management Fee Expense		$ 100,000
Option exercise fee	$ 1,500,000
Research and Development Expense			$ 0		$ 0
Acuitas Therapeutics Inc [Member] \| Target One And Two [Member]
Annual license maintenance fee	1,000,000.0
Acuitas Therapeutics Inc [Member] \| Target Three [Member]
Annual license maintenance fee	$ 800,000