Stock Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of stock-based compensation expenses
Stock-based compensation expenses	$ 656	$ 878	$ 2,189	$ 2,791
Product costs [Member]
Schedule of stock-based compensation expenses
Stock-based compensation expenses	5	18	31	59
Research and development [Member]
Schedule of stock-based compensation expenses
Stock-based compensation expenses	71	271	453	865
Selling, general and administrative [Member]
Schedule of stock-based compensation expenses
Stock-based compensation expenses	$ 580	$ 589	$ 1,705	$ 1,867