INCOME TAXES - COMPANY'S NET DEFERRED TAX ASSETS AND LIABILITIES (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016
Deferred tax assets:
Stock based compensation	$ 3,671	$ 2,898
Net operating loss carryforwards	3,453	7,095
Research credit carryforwards	3,171	44
AMT credit carryforwards	392	279
Foreign net operating losses	386	327
Other, net	770	320
Total deferred assets	11,843	10,963
Deferred tax liabilities:
Intangibles	(393)	(473)
Foreign deferred liabilities	(280)	(356)
Net deferred tax asset	11,170	10,134
Valuation allowance for net deferred tax assets	(105)	(10,163)
Net deferred tax asset	$ 11,065
Net deferred tax (liability)		$ (29)