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Debt - Short-term borrowing (Details) $ in Thousands, ¥ in Millions	1 Months Ended	3 Months Ended
	Oct. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 CNY (¥)	Jun. 30, 2022 USD ($)	Sep. 30, 2021 CNY (¥)	Jun. 30, 2021 USD ($)	Oct. 31, 2019 CNY (¥)	Nov. 16, 2018 USD ($)	Nov. 16, 2018 CNY (¥)
Short-term Debt [Line Items]
Short-term debt | $				$ 25,563		$ 58,030
Bank Of Communications Limited
Short-term Debt [Line Items]
Short-term debt | $				1,600
Maximum borrowing capacity	$ 8,500				¥ 140.0		¥ 60.0
Bank Of Communications Limited | Credit Facility, 3 Point 85 Percent, Due November 18, 2022
Short-term Debt [Line Items]
Proceeds from short-term debt		$ 1,600	¥ 11.0
Stated interest rate		3.85%	3.85%
Industrial And Commercial Bank of China | Foreign Line of Credit
Short-term Debt [Line Items]
Short-term debt				$ 500				$ 10,300	¥ 72.0
Interest rate		370.00%	370.00%
Proceeds from short-term debt		$ 800	¥ 5.0
Industrial And Commercial Bank of China | Foreign Line of Credit | Line of Credit Facility, Trade Borrowings
Short-term Debt [Line Items]
Maximum borrowing capacity | ¥									27.0
Industrial And Commercial Bank of China | Foreign Line of Credit | Line of Credit Facility, Working Capital Borrowings
Short-term Debt [Line Items]
Maximum borrowing capacity | ¥									¥ 45.0
Base Rate | China | Bank Of Communications Limited
Short-term Debt [Line Items]
Basis spread on variable rate	4.99%
Basis spread multiple	1.05						1.05

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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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