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Stockholders' Equity (Tables)

3 Months Ended

Dec. 31, 2012

Stockholders' Equity [Abstract]

Stock-based compensation expense related to stock options and restricted stock unit awards

		Three months ended December 31,
		2012				2011
Sales and marketing		$	76,653			$	69,563
Research and development			123,578				107,219
General and administrative			456,303				324,915
Stock-based compensation expense included in operating expenses		$	656,534			$	501,697

Fair value calculations for stock-based compensation awards to employees

		Three months ended December 31,
		2012		2011
Risk-free interest rate		0.18% - 0.71%		0.35% - 1.06%
Expected life (years)		4.91		4.14
Expected volatility		165%		90%
Expected dividends		None		None

Stock option activity under the Company's equity plans

		Number of Shares				Weighted-Average Exercise Price				Weighted Average Remaining Contractual Term (in Years)
Outstanding, September 30, 2012			3,512,286			$	3.39				6.46
Granted			394,563			$	2.52
Exercised			(46,067	)		$	0.81
Cancelled			(80,311	)		$	7.77
Outstanding, December 31, 2012			3,780,471			$	3.23				6.53

Significant ranges of outstanding and exercisable options

Range of Exercise Prices		Number of Options Outstanding				Weighted Average Remaining Contractual Life (in Years)				Weighted Average Exercise Price				Number of Exercisable Options				Weighted Average Exercise Price of Exercisable Options				Number of Unvested Options
$0.09 – $ 0.79			877,935				5.48			$	0.60				846,507			$	0.60				31,428
$0.80 – $ 1.95			946,116				2.51			$	1.12				941,251			$	1.12				4,865
$2.34 – $ 2.60			847,002				8.65			$	2.50				209,633			$	2.60				637,369
$3.33 – $ 9.97			738,668				9.16			$	5.96				110,912			$	8.91				627,756
$11.05 – $ 11.68			370,750				9.13			$	11.08				17,991			$	11.19				352,759
			3,780,471				6.53			$	3.23				2,126,294			$	1.55				1,654,177

Number of stock options outstanding under prior plans

2000 Stock Option Plan			316,392
2002 Stock Option Plan			243,163
2006 Stock Option Plan			368,000
2010 Stock Option Plan			1,372,853
Total stock options outstanding under the Prior Plans			2,300,408

Restricted stock units activity under Company's plan

		Number of Shares				Weighted Average Fair Market Value Per Share
Outstanding, September 30, 2012			515,834			$	6.30
Granted			215,000			$	2.69
Settled			—				—
Cancelled			(11,667	)		$	11.05
Outstanding, December 31, 2012			719,167			$	5.15

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Stock options outstanding under Plans.

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible).

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