Reportable Segments and Major Concentration Data-Asset Concentration Segment Based on Geography (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Disclosure Of Asset Concentration Based On Geographical Location [Line Items]
Assets	$ 405,261	$ 325,478	$ 251,377
Israel [Member]
Disclosure Of Asset Concentration Based On Geographical Location [Line Items]
Assets	70,097
United Kingdom [Member]
Disclosure Of Asset Concentration Based On Geographical Location [Line Items]
Assets	27,373	22,963
Germany [Member]
Disclosure Of Asset Concentration Based On Geographical Location [Line Items]
Assets	12,877	7,141
Canada [Member]
Disclosure Of Asset Concentration Based On Geographical Location [Line Items]
Assets	9,865	6,807
Italy [Member]
Disclosure Of Asset Concentration Based On Geographical Location [Line Items]
Assets	$ 7,858	$ 7,557