Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit (unaudited) - USD ($) $ in Thousands	Total	Adjusted balance	Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred Stock Adjusted balance	Common Stock	Common Stock Adjusted balance	Additional Paid-in Capital	Additional Paid-in Capital Adjusted balance	Accumulated Deficit	Accumulated Deficit Adjusted balance	Accumulated Other Comprehensive (Loss) Income
Beginning Balance at Dec. 31, 2020	$ (104,902)	$ (104,902)					$ 9,905	$ 9,905	$ (114,807)	$ (114,807)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2020			23,785,202	27,381,299
Temporary Equity, Beginning Balance at Dec. 31, 2020			$ 116,886	$ 116,886
Beginning Balance, Shares at Dec. 31, 2020					1,157,868	1,332,926
Retroactive application of recapitalization (Note 1)					175,058
Retroactive application of recapitalization (Note 1), Shares, Temporary Equity					3,596,097
Stock-based compensation expense	1,800						1,800
Exercise of stock options, Shares					6
Issuance of common stock warrants	268						268
Issuance of convertible preferred stock, net of issuance costs			$ 109,681
Issuance of convertible preferred stock, net of issuance costs, Shares			15,027,075
Stock dividend accrued for Series D preferred stock	(1,115)						(1,115)
Stock dividend accrued for Series D preferred stock, Temporary Equity			$ 1,115
Redemption value of Series D preferred stock	(55,877)						(10,858)		(45,019)
Redemption value of Series D preferred stock, Temporary Equity			$ 55,877
Net income (loss)	(23,600)								(23,600)
Ending Balance at Jun. 30, 2021	(183,426)								(183,426)
Temporary Equity, Ending Balance, Shares at Jun. 30, 2021			42,408,374
Temporary Equity, Ending Balance at Jun. 30, 2021			$ 283,559
Ending Balance, Shares at Jun. 30, 2021					1,332,932
Beginning Balance at Dec. 31, 2020	(104,902)	(104,902)					9,905	$ 9,905	(114,807)	(114,807)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2020			23,785,202	27,381,299
Temporary Equity, Beginning Balance at Dec. 31, 2020			$ 116,886	$ 116,886
Beginning Balance, Shares at Dec. 31, 2020					1,157,868	1,332,926
Net income (loss)	(41,737)
Ending Balance at Sep. 30, 2021	(203,828)								(203,828)
Temporary Equity, Ending Balance, Shares at Sep. 30, 2021			42,408,374
Temporary Equity, Ending Balance at Sep. 30, 2021			$ 287,718
Ending Balance, Shares at Sep. 30, 2021					1,456,530
Beginning Balance at Jun. 30, 2021	(183,426)								(183,426)
Temporary Equity, Beginning Balance, Shares at Jun. 30, 2021			42,408,374
Temporary Equity, Beginning Balance at Jun. 30, 2021			$ 283,559
Beginning Balance, Shares at Jun. 30, 2021					1,332,932
Stock-based compensation expense	1,748						1,748
Exercise of stock options	146						146
Exercise of stock options, Shares					123,599
Stock dividend accrued for Series D preferred stock	(2,773)						(1,510)		(1,263)
Stock dividend accrued for Series D preferred stock, Temporary Equity			2,773
Redemption value of Series D preferred stock	(1,386)						(384)		(1,002)
Redemption value of Series D preferred stock, Temporary Equity			$ 1,386
Net income (loss)	(18,137)								(18,137)
Ending Balance at Sep. 30, 2021	(203,828)								(203,828)
Temporary Equity, Ending Balance, Shares at Sep. 30, 2021			42,408,374
Temporary Equity, Ending Balance at Sep. 30, 2021			$ 287,718
Ending Balance, Shares at Sep. 30, 2021					1,456,530
Beginning Balance at Dec. 31, 2021	$ (226,114)	(226,114)							(226,114)	(226,114)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2021	43,318,218		37,629,060	43,318,218
Temporary Equity, Beginning Balance at Dec. 31, 2021	$ 291,876		$ 291,876	$ 291,876
Beginning Balance, Shares at Dec. 31, 2021					1,454,239	1,674,106
Retroactive application of recapitalization (Note 1)					219,867
Retroactive application of recapitalization (Note 1), Shares, Temporary Equity			5,689,158
Stock-based compensation expense	4,039						4,039
Exercise of stock options	105						105
Exercise of stock options, Shares					32,557
Stock dividend accrued for Series D preferred stock	(5,785)						(4,144)		(1,641)
Stock dividend accrued for Series D preferred stock, Temporary Equity			$ 5,785
Redemption value of Series D preferred stock	(2,893)								(2,893)
Redemption value of Series D preferred stock, Temporary Equity			$ 2,893
Other comprehensive gain (loss)	(7)										$ (7)
Net income (loss)	(44,385)								(44,385)
Ending Balance at Jun. 30, 2022	(275,040)								(275,033)		(7)
Temporary Equity, Ending Balance, Shares at Jun. 30, 2022			43,318,218
Temporary Equity, Ending Balance at Jun. 30, 2022			$ 300,554
Ending Balance, Shares at Jun. 30, 2022					1,706,663
Beginning Balance at Dec. 31, 2021	$ (226,114)	$ (226,114)							(226,114)	$ (226,114)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2021	43,318,218		37,629,060	43,318,218
Temporary Equity, Beginning Balance at Dec. 31, 2021	$ 291,876		$ 291,876	$ 291,876
Beginning Balance, Shares at Dec. 31, 2021					1,454,239	1,674,106
Exercise of stock options, Shares	58,745
Net income (loss)	$ 8,851
Ending Balance at Sep. 30, 2022	$ 123,872				$ 8		347,330		(223,473)		7
Temporary Equity, Ending Balance, Shares at Sep. 30, 2022	0
Ending Balance, Shares at Sep. 30, 2022					77,858,746
Beginning Balance at Jun. 30, 2022	$ (275,040)								(275,033)		(7)
Temporary Equity, Beginning Balance, Shares at Jun. 30, 2022			43,318,218
Temporary Equity, Beginning Balance at Jun. 30, 2022			$ 300,554
Beginning Balance, Shares at Jun. 30, 2022					1,706,663
Stock-based compensation expense	1,673						1,673
Exercise of stock options	40						40
Exercise of stock options, Shares					26,188
Stock dividend accrued for Series D preferred stock	(1,598)						(721)		(877)
Stock dividend accrued for Series D preferred stock, Temporary Equity			$ 1,598
Stock dividend accrued for Series D preferred stock, Shares, Temporary Equity			1,008,596
Redemption value of Series D preferred stock	(799)								(799)
Redemption value of Series D preferred stock, Temporary Equity			$ 799
Redemption value of Series D preferred stock, Shares, Temporary Equity			8,472,752
Exercise of Legacy Akili warrants					8,834
Conversion of redeemable preferred stock into permanent equity, Temporary Equity			$ (302,951)
Conversion of redeemable preferred stock into permanent equity, Shares, Temporary Equity			(52,799,566)
Conversion of redeemable preferred stock into permanent equity	302,951				$ 5		302,946
Conversion of redeemable preferred stock into permanent equity, Shares					52,799,566
Issuance of common stock upon Business Combination and PIPE Investment	164,283				$ 3		164,280
Issuance of common stock upon Business Combination and PIPE Investment, Shares					23,317,495
Reverse recapitalization, net of transaction costs (including ($87,512) of deemed dividends related to Earn-Out Shareholders)	(120,888)						(120,888)
Other comprehensive gain (loss)	14										14
Net income (loss)	53,236								53,236
Ending Balance at Sep. 30, 2022	$ 123,872				$ 8		$ 347,330		$ (223,473)		$ 7
Temporary Equity, Ending Balance, Shares at Sep. 30, 2022	0
Ending Balance, Shares at Sep. 30, 2022					77,858,746