Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 1,766	$ 1,648	$ 3,978	$ 7,672
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	681	532	857	(1,120)
Change in net unrealized gain on investments	0	4	0	18
Less income tax expense	0	(1)	0	(5)
Other comprehensive income (loss), net of tax	681	535	857	(1,107)
Comprehensive income	$ 2,447	$ 2,183	$ 4,835	$ 6,565