Revenue Concentration (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020
Revenue, Major Customer [Line Items]
Revenue	$ 25,976	$ 22,067
Accounts receivable, net	12,714		$ 15,612
Customer Concentration Risk | Sales Revenue Net
Revenue, Major Customer [Line Items]
Revenue	3,900	8,100
Customer Concentration Risk | Accounts Receivable
Revenue, Major Customer [Line Items]
Accounts receivable, net	$ 100	$ 4,400
Customer Concentration Risk | Customer One | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage	15.00%	20.00%
Customer Concentration Risk | Customer Two | Sales Revenue Net
Revenue, Major Customer [Line Items]
Total revenue, percentage		17.00%
Geographic Concentration Risk | Sales Revenue Net | International
Revenue, Major Customer [Line Items]
Total revenue, percentage	31.00%	25.00%
Geographic Concentration Risk | Long-term Assets | International
Revenue, Major Customer [Line Items]
Total revenue, percentage	64.00%		66.00%
Geographic Concentration Risk | Long-term Assets, Excluding Goodwill and Other Intangibles | International
Revenue, Major Customer [Line Items]
Total revenue, percentage	15.00%		15.00%