CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,474)	$ (7,184)	$ (8,242)	$ (8,234)
Other comprehensive income (loss):
Change in unrealized losses on available-for-sale securities, net of tax	2	(3)	(7)	(3)
Foreign currency translation adjustments	(1,558)	66	(1,691)	263
Total other comprehensive income (loss)	(1,556)	63	(1,698)	260
Total comprehensive loss	$ (3,030)	$ (7,121)	$ (9,940)	$ (7,974)