INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Deferred tax assets:
Net operating loss carryforwards	$ 35,935	$ 27,309
Tax credit carryforwards	1,246	1,246
Stock option compensation expense	11,744	9,666
Book accruals	3,274	5,604
Deferred tax assets	52,199	43,825
Deferred tax liabilities:
Difference in book and tax basis of equipment	496	(2,500)
Deferred dividend withholding tax	(784)	0
Deferred tax liabilities	288	2,500
Net deferred tax assets (liabilities) before valuation allowance	51,911	41,325
Valuation allowance	(52,105)	(41,810)
Net deferred tax liabilities	$ (194)	$ (485)