COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Movement in standard product warranty accrual [Roll Forward]
Balance as of beginning of period	$ 209
Reserve for product warranty during the reporting period	595
Settlement of warranty	(561)
Balance as of end of period	$ 243	$ 209
Lease commitments [Abstract]
Expiration of cancelable and noncancelable leases, maximum	5 years
Rent expense under operating leases	$ 2,765	2,195	$ 2,425
Operating leases, future minimum payments due:
2017	2,441
2018	1,637
2019	1,440
2020	1,006
2021	719
Thereafter	2,845
Operating leases, total	10,088
Purchase obligations [Abstract]
Purchase obligation, due in 2017	1,500
Purchase obligation, due in 2018	1,500
Purchase obligation, due in 2019	1,500
Purchase obligation	4,380
Current Portion Long Term Contract Liability	1,500	0
Long Term Contract Liability	2,880
Contractual obligation	7,933
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	1,024	962	$ 652
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2017	407
2018	335
2019	373
2020	628
2021	459
2022 to 2026	3,888
Foreign Postretirement Benefit Plans, Defined Benefit [Member] | Japan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	7,091	5,197
Accumulated benefit obligation	$ 5,827	$ 3,941
Weighted average discount rate	0.25%	1.25%
Expected rate of compensation increase	2.00%	2.00%
Pension costs in accumulated other comprehensive income	$ 1,667	$ 1,076
Foreign Postretirement Benefit Plans, Defined Benefit [Member] | South Korea [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit obligation	$ 1,822	$ 1,155
Weighted average discount rate	3.00%	4.00%
Expected rate of compensation increase	5.00%	4.50%
Pension costs in accumulated other comprehensive income	$ 530	$ 102