BUSINESS COMBINATION - ADDITIONAL INFORMATION (Detail) - IDchecker - USD ($) $ in Thousands		1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 17, 2015	Jan. 31, 2016	Sep. 30, 2017	Sep. 30, 2015	Sep. 30, 2016
Business Acquisition [Line Items]
Acquisition date	Jun. 17, 2015
Total consideration paid	$ 5,900
Payments to acquire businesses, gross	5,600
Business combination consideration transfer, promissory notes	300
Common stock issued during acquisition, value	$ 2,700
Common stock issued during acquisition (in shares)	712,790
Earnout shares issued (in shares)		137,306		137,306	81,182
Cash payment to escrow fund related to business acquisition	$ 1,800
Business combination, percentage of closing shares in escrow fund	20.00%
Earnout shares deposited in escrow fund		27,461
Escrow deposit released during period			$ 1,800
Goodwill before effect in exchange rates	$ 2,873