DETAIL OF SELECTED BALANCE SHEET ACCOUNTS - Activity in Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ 179	$ 811
Bad debt expense (recovery)	(20)	(113)
Uncollectible accounts written off, net of recoveries	(1)	(28)
Change due to foreign currency translation	0	(6)
Balance at end of period	$ 158	$ 664