Stock-based Compensation - Summary of Stock Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Thousands				6 Months Ended	9 Months Ended	12 Months Ended
	Apr. 13, 2022	Jun. 16, 2020	May 12, 2015	Jun. 30, 2023	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2013	May 10, 2023	Apr. 12, 2022
Stock-based Compensation
Option outstanding					26,261	26,533
Options available for grant under stock option plans					3,302,385	122,978
Shares Available for Grant
Beginning balance (in shares)				122,978	122,978
Ending balance (in shares)					3,302,385	122,978
Stock Options Outstanding
Beginning balance (in shares)				26,533	26,533
Ending balance (in shares)					26,261	26,533
RSUs Outstanding
Beginning balance (in shares)				44,865	44,865
Ending balance (in shares)					35,278	44,865
Options vested, exercisable and expected to vest
Share Price									$ 1.00
Weighted average grant date fair value of stock options granted (in dollars per share)					$ 0	$ 22.04
Number of options vested (in shares)					1,234	7,492
Weighted average fair value of options vested on grant date					$ 260.15	$ 304.57
Stock options
Stock-based Compensation
Option outstanding					27,783	28,079	33,286
Stock Options Outstanding
Beginning balance (in shares)				28,079	28,079	33,286
Options granted (in shares)						44
Options exercised (in shares)				0		0
Options cancelled (in shares)					(296)	(5,251)
Ending balance (in shares)					27,783	28,079	33,286
Weighted Average Stock Option Exercise Price
Beginning balance (in dollars per share)				$ 592.73	$ 592.73	$ 707.97
Options granted (in dollars per share)						23.46
Options cancelled (in dollars per share)					325.31	418.34
Ending balance (in dollars per share)					$ 595.58	$ 592.73	$ 707.97
Weighted Average Remaining Contractual Life (Years)
Weighted Average Remaining Contractual Life (Years)					6 years 5 months 15 days	7 years 2 months 8 days	8 years 4 months 6 days
Options vested, exercisable and expected to vest
Options vested and exercisable (in shares)					27,089
Options vested and exercisable (in dollars per share)					$ 601.68
Options vested and exercisable (in years)					6 years 5 months 1 day
Options vested and expected to vest (in shares)					27,748
Options vested and expected to vest (in dollars per share)					$ 595.88
Options vested and expected to vest (in years)					6 years 5 months 12 days
Aggregate Intrinsic Value ,granted							$ 3
Options exercised (in shares)				0		0
Stock options and RSUs
Stock-based Compensation
Options available for grant under stock option plans					3,302,385	122,978	8,417
Shares Available for Grant
Beginning balance (in shares)				122,978	122,978	8,417
Additional shares authorized (in shares)					3,191,487	151,079
Options granted (in shares)						(44)
Options cancelled (in shares)					296	5,251
RSUs granted (in shares)					(12,376)	(41,725)
Ending balance (in shares)					3,302,385	122,978	8,417
Restricted stock units issued and outstanding
Shares Available for Grant
RSUs vested and released (in shares)					(13,149)	(2,506)
RSUs Outstanding
Beginning balance (in shares)				44,865	44,865	6,499
RSUs Granted (in shares)					12,376	41,725
RSUs vested and released (in shares)					(13,149)	(2,506)
RSUs Cancelled (in shares)					(8,814)	(853)
Ending balance (in shares)					35,278	44,865	6,499
2013 Plan
Stock-based Compensation
Option shares outstanding					0	0
2013 Plan | Stock options
Stock Options Outstanding
Options granted (in shares)								0
2014 Plan
Stock-based Compensation
Incentive stock option term			10 years
Increase in share reserve based on outstanding number of shares (as a percent)			2.00%
Option outstanding					26,261	26,533
Options available for grant under stock option plans					2,803,907	116,011
Shares Available for Grant
Beginning balance (in shares)				116,011	116,011
Additional shares authorized (in shares)	2,417,660
Ending balance (in shares)					2,803,907	116,011
Stock Options Outstanding
Beginning balance (in shares)				26,533	26,533
Ending balance (in shares)					26,261	26,533
2020 New Employee Inducement Award Plan
Stock-based Compensation
Incentive stock option term		10 years
Option outstanding					1,522	1,546
Options available for grant under stock option plans		166,666			498,478	6,967
Shares Available for Grant
Beginning balance (in shares)				6,967	6,967
Additional shares authorized (in shares)						491,151
Ending balance (in shares)		166,666			498,478	6,967
Stock Options Outstanding
Beginning balance (in shares)				1,546	1,546
Ending balance (in shares)					1,522	1,546
Inducement Award Plan
Stock-based Compensation
Number of shares reserved for issuance	971,833									500,000
Shares Available for Grant
Additional shares authorized (in shares)	471,833
Common Stock
Options vested, exercisable and expected to vest
Share Price					$ 0.26
Participants Voting Power More than Ten Percent | 2014 Plan
Stock-based Compensation
Incentive stock option term			5 years
Participants Voting Power More than Ten Percent | 2020 New Employee Inducement Award Plan
Stock-based Compensation
Incentive stock option term		5 years