Revenue Concentration (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Revenue, Major Customer [Line Items]
Revenue	$ 34,714	$ 28,773	$ 67,186	$ 54,748
Accounts receivable, net	23,858		23,858		$ 16,602
Customer Concentration Risk | Sales Revenue Net
Revenue, Major Customer [Line Items]
Revenue	11,800	6,700	18,200	10,600
Customer Concentration Risk | Accounts Receivable
Revenue, Major Customer [Line Items]
Accounts receivable, net	$ 11,600	$ 3,800	$ 11,600	$ 3,800
Customer Concentration Risk | Customer One | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	19.00%	23.00%	17.00%	19.00%
Customer Concentration Risk | Customer Two | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	15.00%		10.00%
Geographic Concentration Risk | Sales Revenue Net | International
Revenue, Major Customer [Line Items]
Total revenue, percentage	26.00%	26.00%
Geographic Concentration Risk | Long-term Assets | International
Revenue, Major Customer [Line Items]
Total revenue, percentage			66.00%		24.00%
Geographic Concentration Risk | Long-term Assets, Excluding Goodwill and Other Intangibles | International
Revenue, Major Customer [Line Items]
Total revenue, percentage			12.00%		6.00%