STOCK BASED COMPENSATION Compensation costs related to the stock-based compensations plans (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Expiration period			10 years
Number of shares available for future grant	4.5		4.5
Total stock-based compensation expense	$ 1,156,000	$ 1,092,000	$ 3,305,000	$ 3,301,000
Unrecognized stock-based compensation expense	6,300,000		6,300,000
Share limit per share	$ 1.5		$ 1.5
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	161,000	147,000	459,000	415,000
Engineering, research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	428,000	387,000	1,193,000	1,151,000
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 567,000	$ 558,000	$ 1,653,000	$ 1,735,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period over which the unearned stock-based compensation is expected to be recognized			1 year 11 months 9 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period over which the unearned stock-based compensation is expected to be recognized			2 years 1 month 25 days
Stock Options And Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate	5.20%		5.20%