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Segment Information - Major customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019
Segment Reporting Information [Line Items]
Customer Revenues	$ 13,532	$ 21,570	$ 46,199	$ 56,900
Accounts Receivable | Customer Concentration Risk
Segment Reporting Information [Line Items]
% of Total Revenues			10.00%
Customer A | Sales Revenue, Net [Member] | Customer Concentration Risk
Segment Reporting Information [Line Items]
Customer Revenues	$ 800	$ 3,800	$ 4,000	$ 6,800
% of Total Revenues	6.00%	18.00%	9.00%	12.00%
Customer B | Sales Revenue, Net [Member] | Customer Concentration Risk
Segment Reporting Information [Line Items]
Customer Revenues	$ 3,200	$ 3,000	$ 7,000	$ 5,000
% of Total Revenues	23.00%	14.00%	15.00%	9.00%
Customer B | Accounts Receivable | Customer Concentration Risk
Segment Reporting Information [Line Items]
Accounts receivable, gross	$ 6,300		$ 6,300		$ 7,400
% of Total Revenues			39.00%		36.00%
Customer C | Sales Revenue, Net [Member] | Customer Concentration Risk
Segment Reporting Information [Line Items]
Customer Revenues	$ 1,600	$ 1,900	$ 2,300	$ 3,400
% of Total Revenues	12.00%	9.00%	5.00%	6.00%

X

- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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