INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 22,930	$ 35,935
Tax credit carryforwards	2,464	1,246
Stock option compensation expense	10,924	11,744
Deferred Finance Costs, Gross	221	0
Book accruals	3,064	3,274
Deferred tax assets	39,603	52,199
Deferred tax liabilities:
Difference in book and tax basis of equipment	(209)	496
Deferred dividend withholding tax	(907)	(784)
Deferred Tax Liabilities, Other	(1,422)	0
Deferred tax liabilities	2,538	288
Net deferred tax assets (liabilities) before valuation allowance	37,065	51,911
Valuation allowance	(38,573)	(52,105)
Net deferred tax liabilities	$ (1,508)	$ (194)