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Stockholders' Equity (Tables)

6 Months Ended

Mar. 31, 2014

Equity [Abstract]

Stock-Based Compensation Expense Related to Stock Options and RSUs

The following table summarizes stock-based compensation expense related to stock options and RSUs, which was allocated as follows:

		Three Months Ended March 31,								Six Months Ended March 31,
		2014				2013				2014				2013
Sales and marketing		$	234,167			$	98,651			$	435,691			$	175,303
Research and development			192,939				162,481				377,827				286,060
General and administrative			488,944				442,467				931,603				898,770
Stock-based compensation expense included in operating expenses		$	916,050			$	703,599			$	1,745,121			$	1,360,133

Fair Value Calculations for Stock-Based Compensation Awards

The fair value calculations for stock-based compensation awards to employees for the six months ended March 31, 2014 and 2013 were based on the following assumptions:

		Six Months Ended March 31, 2014				Six Months Ended March 31, 2013
Risk-free interest rate			0.12 – 0.63	%			0.18 – 0.81	%
Expected life (years)			2.52				4.98
Expected volatility			96	%			167	%
Expected dividends			None				None

Stock Option Activity

The following table summarizes stock option activity under the Company’s equity plans during the six months ended March 31, 2014:

		Number of Shares				Weighted- Average Exercise Price				Weighted-Average Remaining Contractual Term (in Years)
Outstanding, September 30, 2013			2,824,964			$	4.09				7.29
Granted			—				—
Exercised			(103,223	)		$	1.22
Cancelled			(13,678	)		$	5.33
Outstanding, March 31, 2014			2,708,063			$	4.19				6.82

Significant Ranges of Outstanding and Exercisable Options

The following table summarizes significant ranges of outstanding and exercisable options as of March 31, 2014:

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 to $0.79			336,762				5.75			$	0.73				336,762			$	0.73				—
$0.80 to $1.95			350,000				1.89			$	0.93				350,000			$	0.93				—
$2.34 to $2.60			775,684				7.33			$	2.51				412,717			$	2.55				362,967
$3.33 to $9.97			942,367				8.26			$	5.81				391,383			$	6.72				550,984
$11.05 to $11.68			303,250				7.88			$	11.08				166,225			$	11.08				137,025
			2,708,063				6.82			$	4.19				1,657,087			$	3.68				1,050,976

RSU Activity

The following table summarizes RSU activity under the Company’s equity plans during the six months ended March 31, 2014:

		Number of Shares				Weighted-Average Fair Market Value Per Share
Outstanding, September 30, 2013			692,504			$	4.85
Granted			495,139			$	5.25
Settled			(28,334	)		$	8.96
Cancelled			(3,837	)		$	5.25
Outstanding, March 31, 2014			1,155,472			$	4.92

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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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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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