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	Accumulated Deficit	Accumulated Deficit Adjusted balance	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2021	$ (226,114)	$ (226,114)						$ (226,114)	$ (226,114)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2021			37,629,060	43,318,218
Temporary Equity, Beginning Balance at Dec. 31, 2021			$ 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	2,070						$ 2,070
Exercise of stock options	64						64
Exercise of stock options, Shares					17,268
Stock dividend accrued for Series D preferred stock	(2,877)						(2,134)	(743)
Stock dividend accrued for Series D preferred stock, Temporary Equity			$ 2,877
Redemption value of Series D preferred stock	(1,438)							(1,438)
Redemption value of Series D preferred stock, Temporary Equity			$ 1,438
Other comprehensive income (loss)	(6)									$ (6)
Net income (loss)	(21,892)							(21,892)
Ending Balance at Mar. 31, 2022	(250,193)							(250,187)		(6)
Temporary Equity, Ending Balance, Shares at Mar. 31, 2022			43,318,218
Temporary Equity, Ending Balance at Mar. 31, 2022			$ 296,191
Ending Balance, Shares at Mar. 31, 2022					1,691,374
Beginning Balance at Dec. 31, 2021	(226,114)	$ (226,114)						(226,114)	$ (226,114)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2021			37,629,060	43,318,218
Temporary Equity, Beginning Balance at Dec. 31, 2021			$ 291,876	$ 291,876
Beginning Balance, Shares at Dec. 31, 2021					1,454,239	1,674,106
Net income (loss)	8,851
Ending Balance at Sep. 30, 2022	123,872				$ 8		347,330	(223,473)		7
Ending Balance, Shares at Sep. 30, 2022					77,858,746
Beginning Balance at Mar. 31, 2022	(250,193)							(250,187)		(6)
Temporary Equity, Beginning Balance, Shares at Mar. 31, 2022			43,318,218
Temporary Equity, Beginning Balance at Mar. 31, 2022			$ 296,191
Beginning Balance, Shares at Mar. 31, 2022					1,691,374
Stock-based compensation expense	1,969						1,969
Exercise of stock options	41						41
Exercise of stock options, Shares					15,289
Stock dividend accrued for Series D preferred stock	(2,908)						(2,010)	(898)
Stock dividend accrued for Series D preferred stock, Temporary Equity			2,908
Redemption value of Series D preferred stock	(1,455)							(1,455)
Redemption value of Series D preferred stock, Temporary Equity			$ 1,455
Other comprehensive income (loss)	(1)									(1)
Net income (loss)	(22,493)							(22,493)
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
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 income (loss)	14									14
Net income (loss)	53,236							53,236
Ending Balance at Sep. 30, 2022	123,872				$ 8		347,330	(223,473)		7
Ending Balance, Shares at Sep. 30, 2022					77,858,746
Beginning Balance at Dec. 31, 2022	110,679				$ 8		350,980	(240,288)		(21)
Beginning Balance, Shares at Dec. 31, 2022					78,022,924
Stock-based compensation expense	2,449						2,449
Exercise of stock options, Shares					16,713
Vesting of RSU's					78,161
Other comprehensive income (loss)	23									23
Net income (loss)	(20,711)							(20,711)
Ending Balance at Mar. 31, 2023	92,440				$ 8		353,429	(260,999)		2
Ending Balance, Shares at Mar. 31, 2023					78,117,798
Beginning Balance at Dec. 31, 2022	$ 110,679				$ 8		350,980	(240,288)		(21)
Beginning Balance, Shares at Dec. 31, 2022					78,022,924
Exercise of stock options, Shares	28,778
Net income (loss)	$ (48,346)
Ending Balance at Sep. 30, 2023	69,094				$ 8		357,720	(288,634)
Ending Balance, Shares at Sep. 30, 2023					78,309,213
Beginning Balance at Mar. 31, 2023	92,440				$ 8		353,429	(260,999)		2
Beginning Balance, Shares at Mar. 31, 2023					78,117,798
Stock-based compensation expense	2,309						2,309
Exercise of stock options, Shares					11,511
Vesting of RSU's					45,223
Other comprehensive income (loss)	(27)									(27)
Net income (loss)	(11,759)							(11,759)
Ending Balance at Jun. 30, 2023	82,963				$ 8		355,738	(272,758)		25
Ending Balance, Shares at Jun. 30, 2023					78,174,532
Stock-based compensation expense	1,982						1,982
Vesting of RSU's					134,681
Other comprehensive income (loss)	25									$ 25
Net income (loss)	(15,876)							(15,876)
Ending Balance at Sep. 30, 2023	$ 69,094				$ 8		$ 357,720	$ (288,634)
Ending Balance, Shares at Sep. 30, 2023					78,309,213