Stockholders' Equity (Tables)

6 Months Ended

Mar. 31, 2015

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,
	2015		2014		2015		2014
Sales and marketing	$	191,962	$	234,167	$	367,080	$	435,690
Research and development		159,563		192,939		296,970		377,827
General and administrative		519,595		488,944		1,021,131		931,604
Stock-based compensation expense included in operating    expenses	$	871,120	$	916,050	$	1,685,181	$	1,745,121

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, 2015 were based on the following assumptions:

	SixMonths Ended March 31, 2015
Risk-free interest rate	1.29 – 1.66%
Expected life (years)		5.25
Expected volatility		98%
Expected dividends	None

Stock Option Activity

The following table summarizes stock option activity under the Company’s equity plans during the six months ended March 31, 2015:

	Number of Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in Years)
Outstanding, September 30, 2014		2,334,326		$	4.11		5.46
Granted		1,565,500		$	2.74
Exercised		(4,166	)	$	2.34
Cancelled		(184,939	)	$	4.66
Outstanding, March 31, 2015		3,710,721		$	3.51		7.08

RSU Activity

The following table summarizes RSU activity under the Company’s equity plans during the six months ended March 31, 2015:

	Number of Shares			Weighted-Average FairMarket Value Per Share
Outstanding, September 30, 2014		1,101,303		$	4.71
Granted		104,000		$	2.29
Settled		(204,041	)	$	2.91
Cancelled		(75,171	)	$	4.30
Outstanding, March 31, 2015		926,091		$	4.32