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Stockholders' Equity (Tables)

3 Months Ended

Dec. 31, 2013

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 December 31,
		2013				2012
Sales and marketing		$	201,524			$	76,653
Research and development			184,888				123,578
General and administrative			442,659				456,303
Stock-based compensation expense included in operating expenses		$	829,071			$	656,534

Fair Value Calculations for Stock-Based Compensation Awards

The fair value calculations for stock-based compensation awards were based on the following assumptions:

		Three months ended December 31,
		2013		2012
Risk-free interest rate		0.12% - 0.63%		0.18% - 0.71%
Expected life (years)		2.52		4.91
Expected volatility		96%		165%
Expected dividends		None		None

Stock Option Activity

The following table summarizes stock option activity under the Company’s equity plans during the three months ended December 31, 2013:

		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			(67,226	)		$	1.03
Cancelled			(3,708	)		$	4.44
Outstanding, December 31, 2013			2,754,030			$	4.16				7.05

Significant Ranges of Outstanding and Exercisable Options

The following table summarizes significant ranges of outstanding and exercisable options as of December 31, 2013:

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			353,436				6.00			$	0.73				353,436			$	0.73				—
$0.80 to $1.95			355,695				2.11			$	0.94				355,695			$	0.94				—
$2.34 to $2.60			789,624				7.58			$	2.51				382,549			$	2.55				407,075
$3.33 to $9.97			951,586				8.51			$	5.81				334,625			$	6.86				616,961
$11.05 to $11.68			303,689				8.13			$	11.08				146,881			$	11.08				156,808
			2,754,030				7.05			$	4.16				1,573,186			$	3.49				1,180,844

RSU Activity

The following table summarizes RSU activity under the Company’s equity plans during the three months ended December 31, 2013:

		Number of Shares				Weighted-Average Fair Market Value Per Share
Outstanding, September 30, 2013			692,504			$	4.85
Granted			495,139			$	5.25
Settled			(7,500	)		$	3.17
Cancelled			(630	)		$	5.25
Outstanding, December 31, 2013			1,179,513			$	5.03

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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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