Share-Based Compensation - General (Details)	1 Months Ended		9 Months Ended
	Jun. 30, 2023 shares	Feb. 28, 2019 shares	Sep. 30, 2023 plan shares
Share-Based Compensation
Number of equity incentive plans | plan			2
2015 Plan
Share-Based Compensation
Maximum number of shares authorized to be issued (in shares)			12,500,000
Number of additional shares authorized (in shares)	1,000,000
2019 Inducement Plan | Newly-Hired Employees
Share-Based Compensation
Number of equity incentive plans | plan			1
Granted (in shares)		99,000
Amended and Restated Equity Incentive Plan (The 1999 Plan)
Share-Based Compensation
Granted (in shares)			0