Segment Information - Major customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Customer Revenues	$ 13,326	$ 13,721	$ 37,676	$ 39,197
Customer A | Sales Revenue, Net [Member] | Customer Concentration Risk
Segment Reporting Information [Line Items]
Customer Revenues	$ 2,100	$ 500	$ 6,400	$ 2,300
Concentration risk percentage	15.00%	4.00%	17.00%	6.00%
Customer A | Accounts Receivable | Customer Concentration Risk
Segment Reporting Information [Line Items]
Accounts receivable, gross	$ 9,200		$ 9,200
Concentration risk percentage			38.00%
Customer B | Sales Revenue, Net [Member] | Customer Concentration Risk
Segment Reporting Information [Line Items]
Customer Revenues	$ 200	$ 1,400	$ 700	$ 2,200
Concentration risk percentage	1.00%	11.00%	2.00%	6.00%