Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2017
Income Taxes [Line Items]
United States statutory tax rate	21.00%	21.00%
Cash and cash equivalents held by foreign subsidiaries	$ 2,600	$ 2,600
Temporary difference related to undistributed earnings	6,900	6,500
Unrecognized tax liabilities	0	0
Valuation allowance against net deferred tax assets	3,768	2,893
United States
Income Taxes [Line Items]
Net operating loss, carryforwards	106,200		$ 28,000
Net operating loss, carryforwards expiration year			2028
Net operating loss, carryforwards after tax act do not expire	77,900
Valuation allowance against net deferred tax assets	35,500	31,700
Canada
Income Taxes [Line Items]
Net operating loss, carryforwards	$ 19,800
Net operating loss, carryforwards expiration year	2033
Valuation allowance against net deferred tax assets	$ 5,200	5,400
Russia
Income Taxes [Line Items]
Net operating loss, carryforwards	$ 2,300
Net operating loss, carryforwards expiration year	2026
Valuation allowance against net deferred tax assets	$ 700	$ 300