Equity Method Investments - Summarized unaudited financial data (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2019 USD ($)
Summary financial information of equity method investments
Current assets	$ 34,719
Non-current assets	29,507
Current liabilities	74,917
Non-current liabilities	41,296
Redeemable stock and non-controlling interests	(392)
Net revenue	37,380
Operating loss	(37,623)
Net loss	$ (58,057)