Stock-Based Compensation - Additional Information (Detail) (USD $)	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 49,000	$ 46,000
Non-statutory stock options granted, shares	32,000
Non-statutory stock options granted, exercise price	$ 1.36
Remaining unrecognized compensation cost related to unvested stock-based arrangements, value	$ 41,000
Remaining unrecognized compensation cost related to unvested stock-based arrangements, period for recognition	1 year 6 months
Stock options exercised
Non-Statutory Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-statutory stock options granted, shares		4,000
Non-statutory stock options granted, exercise price		$ 1.56
Non-statutory stock options granted, per-share weighted average fair value		$ 1.26
Non-Statutory Stock Options | Stock Options One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-statutory stock options granted, shares	30,000
Non-statutory stock options granted, exercise price	$ 1.31
Non-statutory stock options granted, per-share weighted average fair value	$ 1.07
Non-Statutory Stock Options | Stock Options Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-statutory stock options granted, shares	2,000
Non-statutory stock options granted, exercise price	$ 2.12
Non-statutory stock options granted, per-share weighted average fair value	$ 1.79
Incentive Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-statutory stock options granted, shares		53,233
Non-statutory stock options granted, exercise price		$ 1.56
Non-statutory stock options granted, per-share weighted average fair value		$ 1.26