Equity - Narrative (Details)			1 Months Ended	12 Months Ended
	Aug. 23, 2023 USD ($) $ / shares shares	Feb. 17, 2023 USD ($) $ / shares shares	Dec. 31, 2022 shares	Sep. 30, 2023 USD ($) plan $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive compensation plans maintained by the company | plan				4
Granted (in shares)				0	0
Common stock, shares authorized (in shares)				100,000,000	100,000,000
Common stock, no par value (in dollars per share) | $ / shares				$ 0	$ 0
Preferred stock, shares authorized (in shares)				5,882,352
Preferred stock par value (in usd per share) | $ / shares				$ 0.0001
Sale of stock, price per share (USD per share) | $ / shares	$ 0.00000001
Common stock, shares issued (in shares)				84,014,000	44,497,000
Preferred stock, shares issued (in shares)				0	0
Preferred stock, outstanding (in shares)				0	0
Internal Revenue Service (IRS)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Operating loss carryforwards | $				$ 391,500,000	$ 424,900,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	11,900,000
Sale of stock, price per share (USD per share) | $ / shares	$ 0.49999999
Common Stock | IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	22,600,000	15,454,546
Sale of stock, price per share (USD per share) | $ / shares	$ 0.50	$ 1.10
Gross proceeds from issuance, initial public offering | $	$ 15,600,000	$ 15,400,000
2019 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional number of shares authorized for the plan (in shares)			1,549,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, contractual life (in years)				10 years
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				4 years
Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				5 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value vested | $				$ 27,300
Restricted Stock | Equity Incentive Plans 2012 and 2010 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				3 years
Restricted Stock | Equity Incentive Plans 2012 and 2010 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				4 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense | $				$ 6,500,000
Weighted average remaining service period (in years)				3 years 1 month 6 days
Unvested stock units (in shares)				4,030,076	2,947,130
Unvested stock units | $				$ 1,900,000
Unvested stock units weighted average remaining contractual term (in years)				1 year 9 months 18 days
Intrinsic value vested | $				$ 1,300,000	$ 3,000,000
Weighted average fair value (in usd per share) | $ / shares				$ 1.00	$ 3.46
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining service period (in years)				1 year 3 months 18 days
Unvested stock units (in shares)				1,704,418	1,809,053
Intrinsic value vested | $				$ 300,000	$ 300,000
Weighted average fair value (in usd per share) | $ / shares				$ 0.97	$ 4.51
Unamortized stock-based compensation expense | $				$ 2,700,000
Intrinsic value of non-vested and expected to vest PSUs | $				$ 800,000
Average remaining contractual term (in years)				1 year 3 months 18 days
PSUs | Two Thousand Twelve Equity Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				1 year
PSUs | Two Thousand Twelve Equity Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				3 years