Stock Options and Employee Stock Purchase Plan (Details Textual) (USD $)	12 Months Ended				12 Months Ended			12 Months Ended			12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Oct. 01, 2009 Employee	Mar. 05, 2009	Sep. 30, 2012 Employee Stock Purchase Plan [Member]	Sep. 30, 2011 Employee Stock Purchase Plan [Member]	Mar. 31, 2011 Employee Stock Purchase Plan [Member]	Sep. 30, 2012 Qualified Employee Stock Option Plans [Member]	Sep. 30, 2012 Directors' Stock Option Plan [Member]	Mar. 31, 2011 Maximum [Member] Employee Stock Purchase Plan [Member]	Sep. 30, 2012 Selling and marketing expenses [Member]	Sep. 30, 2011 Selling and marketing expenses [Member]	Sep. 30, 2012 General and administrative expenses [Member]	Sep. 30, 2011 General and administrative expenses [Member]	Sep. 30, 2012 Product development expenses [Member]	Sep. 30, 2011 Product development expenses [Member]
Stock Options and Employee Stock Purchase Plan (Textual) [Abstract]
Expected shares issued					100,000
Increase in number of shares under the plan							50,000			100,000
Number of additional shares issued under stockholder approval								600,000	50,000
Number of complete employment days on first day of each offering period					90 days
Employee not eligible to participate					5.00%
Eligible employees contribution to purchase price					10.00%
Restricted participant under purchase plan that exceeds the rate of the fair value of shares					$ 25,000
Restricted participant under purchase plan that exceeds the number of shares					1,000
Purchase shares of common stock at a purchase price fair market					85.00%
Shares available to issue					29,408
Shares purchase by employees					21,010	5,405
Share-based Compensation	742,000	707,000			26,000	16,000					485,000	482,000	43,000	49,000	214,000	176,000
Cash received from issuance of stock under purchase plan	134,000	32,000			134,000	32,000
Stock Options and Employee Stock Purchase Plan (Additional Textual) [Abstract]
Number of replaced former employee stock option plans			2
Directors stock option plan maximum purchased limit				100,000
Number of shares to be granted on each meeting under directors' plan				2,000
Number of shares that holder entitles to purchase at specified option price	1
Duration of termination for stock plan	10 years
Unrecognized non vested stock based compensation	687,000
Estimated forfeitures for unrecognized non vested stock based compensation	91,000
Expected weighted average life of forfeited cost	1 year 9 months 18 days
Proceeds and Excess Tax Benefit from Share-based Compensation	245,000	1,700,000
Tax benefits realized for tax deductions from option exercises	$ 0	$ 0