SHARE-BASED PAYMENT (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Expense related to the restricted stock unit awards [Abstract]
Expense to be recognized through vesting date			$ 351,000
Restricted Stock Units (RSUs) [Member] | Annual Meeting 2012 [Member]
Aggregate intrinsic value [Abstract]
Stock-based compensation expense	91,000		342,000
Restricted stock units awards outstanding [Abstract]
Number of restricted stock units considered for cash payment (in shares)			9,000
Expense related to the restricted stock unit awards [Abstract]
Expense recognized	91,000		342,000
Amended And Restated 2004 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for future issuance under the Plan	1,105,323		1,105,323
Shares under option [Abstract]
Granted (in shares)	15,400
Amended And Restated 2004 Stock Incentive Plan [Member] | In and After August 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Percentage of shares vesting on the first anniversary of the grant date (in hundredths)			25.00%
Additional shares vesting each month until the fourth anniversary			1/48th
Expiration period from grant date			10 years
Amended And Restated 2004 Stock Incentive Plan [Member] | Prior to August 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Percentage of shares vesting on the first anniversary of the grant date (in hundredths)			20.00%
Expiration period from grant date			10 years
Percentage of shares vesting on each of the first five anniversaries of the grant date (in hundredths)			20.00%
Amended And Restated 2004 Stock Incentive Plan [Member] | Stock Options [Member]
Weighted-average assumptions we used to calculate fair value of share-based options using the Black-Scholes model [Abstract]
Expected period that options will be outstanding (in years)	5 years	5 years	5 years	5 years
Interest rate (based on U.S. Treasury yields at time of grant) (in hundredths)	0.90%	0.73%	0.63%	0.93%
Volatility (in hundredths)	47.88%	49.09%	48.09%	48.76%
Dividend yield (in hundredths)	0.00%	0.00%	0.00%	0.00%
Weighted-average fair value of options granted (in dollars per share)	$ 2.49	$ 1.86	$ 2.16	$ 1.53
Weighted-average intrinsic value of options exercised	14,000	0	46,000	0
Aggregate intrinsic value [Abstract]
Stock-based compensation expense	300,000	300,000	800,000	700,000
Aggregate purchase price			402,000
Unrecognized compensation cost related to stock options	2,500,000		2,500,000
Weighted-average period for recognition of compensation cost			2 years 6 months 4 days
Expense related to the restricted stock unit awards [Abstract]
Expense recognized	300,000	300,000	800,000	700,000
Amended And Restated 2004 Stock Incentive Plan [Member] | Stock Options [Member] | In and After August 2010 [Member]
Shares under option [Abstract]
Options outstanding at September 30, 2012 (in shares)			3,160,000
Granted (in shares)			362,900
Exercised (in shares)				(80,783)
Forfeitures or expirations (in shares)			(196,000)
Options outstanding at March 31, 2013 (in shares)	3,246,000		3,246,000
Options vested and expected to vest at March 31, 2013 (in shares)	2,813,000		2,813,000
Options exercisable at March 31, 2013 (in shares)	1,704,000		1,704,000
Weighted-average Exercise Price [Abstract]
Options outstanding at September 30, 2012 (in dollars per share)			$ 5.94
Granted (in dollars per share)			$ 5.26
Exercised (in dollars per share)			$ 4.97
Forfeitures or expirations (in dollars per share)			$ 8.73
Options outstanding at March 31, 2013 (in dollars per share)	$ 5.72		$ 5.72
Options vested and expected to vest at March 31, 2013 (in dollars per share)	$ 5.83		$ 5.83
Options exercisable at March 31, 2013 (in dollars per share)	$ 6.48		$ 6.48
Weighted-average Remaining contractual term [Abstract]
Options outstanding at March 31, 2013			7 years 4 months 6 days
Options vested and expected to vest at March 31, 2013			7 years 5 months 23 days
Options exercisable at March 31, 2013			6 years 3 months 22 days
Aggregate intrinsic value [Abstract]
Stock Issued During Period, Value, Stock Options Exercised			46,000
Options outstanding at March 31, 2013	1,949,000		1,949,000
Options vested and expected to vest at March 31, 2013	763,000		763,000
Options exercisable at March 31, 2013	$ 737,000		$ 737,000
Amended And Restated 2004 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Annual Meeting 2012 [Member]
Aggregate intrinsic value [Abstract]
Restricted stock units granted annually (in shares)			9,000
Restricted stock units awards outstanding [Abstract]
Total restricted stock units awarded	63,000		63,000
Vesting date		Apr. 13, 2013		Apr. 13, 2013