Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 3,157	$ 1,766	$ 5,778	$ 3,978
Other comprehensive (loss) income:
Foreign currency translation adjustment	463	681	2,068	(1,120)
Change in net unrealized gain on investments	0	0	0	18
Less income tax expense	0	0	0	(5)
Other comprehensive income (loss)	463	681	2,068	(1,107)
Comprehensive income (loss)	$ 3,620	$ 2,447	$ 7,846	$ 2,871