SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Current assets:
Accounts receivable	$ (13,492)	$ (2,786)	$ (5,175)
Inventories	4,429	3,827	(3,463)
Other current assets	(9,531)	1,350	(7,034)
Total change in current assets	(18,594)	2,391	(15,672)
Current liabilities:
Trade accounts payable	5,720	(1,205)	1,024
Accrued compensation	(2,504)	7,143	(1,476)
Accrued income taxes	1,330	(2,278)	(2,649)
Other current liabilities	7,883	(9,054)	2,370
Total change in current liabilities	12,429	(5,394)	(731)
Net change	$ (6,165)	$ (3,003)	$ (16,403)