Stock Plans and Stock Based Compensation - Narrative (Details)	1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	May 31, 2021 shares	Sep. 30, 2022 USD ($) shares	Sep. 30, 2022 USD ($) plan purchase_period $ / shares shares	Sep. 30, 2021 USD ($) $ / shares	Dec. 31, 2016 purchase_period	Dec. 31, 2021 shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of shareholder-approved, share-based compensation plans | plan			2
Granted (in shares)			6,108,100
Weighted average grant-date fair values of stock options (in dollars per share) | $ / shares			$ 2.18	$ 9.21
Unrecognized compensation cost, net of estimated forfeitures | $		$ 9,300,000	$ 9,300,000
Unrecognized compensation cost, weighted average period for recognition			3 years 3 months 18 days
Intrinsic values of employee stock options exercised | $			$ 0	$ 500,000
Outstanding shares (in shares)		0	0
Restricted Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting period (years)			4 years
Awarded (in shares)			0
Outstanding shares (in shares)		0	0			10,312
Restricted Stock | Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Awarded (in shares)			2,019,300
Amended and Restated 2010 Stock Incentive Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares authorized (in shares)	23,190,000
Number of shares under award to be removed from share pool			9,980,365
Amended and Restated 2010 Stock Incentive Plan | Employee Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Additional shares authorized under the plan (in shares)	11,000,000
Amended and Restated 2010 Stock Incentive Plan | Stock Options, or Stock Appreciation Rights
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Period of time options are exercisable	10 years
Shares removed from pool (in shares per share)	1
Amended and Restated 2010 Stock Incentive Plan | Restricted Stock, RSUs, Other Stock-Based Awards, or Performance Awards
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares removed from pool (in shares per share)	1.3
Price charged for award based on fair market value percentage (less than)	100.00%
2010 Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Granted (in shares)			3,663,800
2010 Plan | Non-Employee Directors
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Granted (in shares)			425,000
Vesting period (years)			1 year
2010 Plan | Tranche One
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Percentage of vested shares which are exercisable under stock option			25.00%
2010 Plan | Tranche Two
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Percentage of vested shares which are exercisable under stock option			6.25%
Employee Stock Purchase Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Issuance of stock under Employee Stock Purchase Plan (in shares)		0	169,296
Employee Stock Purchase Plan | Employee Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares authorized (in shares)		2,000,000	2,000,000
Price charged for award based on fair market value percentage (less than)			85.00%
Enrollment period			2 years
Number of purchase periods per year | purchase_period			4		2
Term of purchase periods			6 months		6 months
Shares available for future purchase under ESPP (in shares)		1,384,234	1,384,234