Long-Term Debt - Narrative (Details)			3 Months Ended			9 Months Ended
	Apr. 05, 2022 USD ($) day	Feb. 16, 2018 USD ($) $ / shares Rate	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Schedule of Capitalization, Long-term Debt [Line Items]
Interest expense, debt			$ 3,564,000		$ 1,929,000	$ 9,087,000	$ 5,788,000
Coupon interest expense			1,646,000		1,617,000	4,852,000	4,851,000
Amortization of debt discount and debt issuance costs			$ 1,918,000		$ 312,000	4,147,000	937,000
Additional interest expense						88,000
Payments of debt issuance costs						$ 4,803,000	$ 0
Change in fair value of October 2023 Notes conversion feature	$ 5,508,000			$ 5,508,000
Increase in fair value of unseparated embedded conversion feature	5,508,000
ADSs, conversion ratio | Rate		9269.56%
4.50% Exchangeable Senior Notes Due 2023 | Convertible Debt
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, face amount		$ 125,000
Option to purchase aggregate principal amount, term (in days)		30 days
Option to increase aggregate principal amount		$ 18,750,000
Proceeds from loans or conditional grants		137,560,000
ADS, minimum amount of principal amount for exchange		$ 200,000
ADS, option price per share (in dollars per share) | $ / shares		$ 10.79
4.50% Exchangeable Senior Notes Due October 2023 | Convertible Debt
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, exchange amount	$ 117,375,000
4.50% Exchangeable Senior Notes Due October 2023 | Convertible Debt | Debt Instrument, Redemption, Period One
Schedule of Capitalization, Long-term Debt [Line Items]
Number of business days (in days)	5 days
Consecutive business days (in days)	5 days
Percentage of product of the last reported sale price of the American Depositary Shares and the exchange rate on each such trading day(as a percent)	98.00%
4.50% Exchangeable Senior Notes Due October 2023 | Convertible Debt | Debt Instrument, Redemption, Period Two
Schedule of Capitalization, Long-term Debt [Line Items]
Threshold trading days (in days) | day	95
Scheduled threshold trading days (in days)	35 days
4.50% Exchangeable Senior Notes Due October 2023 | Convertible Debt | Debt Instrument, Redemption, Period Three
Schedule of Capitalization, Long-term Debt [Line Items]
Threshold trading days (in days) | day	20
Consecutive trading days (in days) | day	30
Threshold percentage of stock price trigger (as a percent)	130.00%
4.50% Exchangeable Senior Notes Due 2023 | Convertible Debt
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, face amount	$ 26,375,000
4.50 Percent Exchangeable Senior Notes Due October 2023 | Senior Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Payments of debt issuance costs	4,804,000
4.50 Percent Exchangeable Senior Notes Due October 2023 | Senior Notes | Third Party
Schedule of Capitalization, Long-term Debt [Line Items]
Payments of debt issuance costs	$ 5,450,000