Revenue Concentration (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Revenue, Major Customer [Line Items]
Revenue	$ 31,778	$ 25,413	$ 86,526	$ 70,672
Accounts receivable, net	18,583		18,583		$ 15,612
Customer Concentration Risk | Sales Revenue Net
Revenue, Major Customer [Line Items]
Revenue	12,900	6,400	23,700	10,800
Customer Concentration Risk | Accounts Receivable
Revenue, Major Customer [Line Items]
Accounts receivable, net	$ 5,900	$ 4,200	$ 5,900	$ 4,200
Customer Concentration Risk | Customer One | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	16.00%	15.00%	17.00%	15.00%
Customer Concentration Risk | Customer Two | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	13.00%	11.00%	10.00%
Customer Concentration Risk | Customer Three | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	11.00%
Geographic Concentration Risk | Sales Revenue Net | International
Revenue, Major Customer [Line Items]
Total revenue, percentage	23.00%	25.00%	26.00%	25.00%
Geographic Concentration Risk | Long-term Assets | International
Revenue, Major Customer [Line Items]
Total revenue, percentage			26.00%		66.00%
Geographic Concentration Risk | Long-term Assets, Excluding Goodwill and Other Intangibles | International
Revenue, Major Customer [Line Items]
Total revenue, percentage			7.00%		15.00%