Stockholders' Equity (Tables)

3 Months Ended

Dec. 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 December 31,
	2015		2014
Sales and marketing	$	243,027	$	175,118
Research and development		180,642		137,406
General and administrative		565,188		501,536
Stock-based compensation expense included in operating expenses	$	988,857	$	814,060

Fair Value Calculations for Stock-Based Compensation Awards

    The fair value calculations for stock-based compensation awards to employees for the three months ended December 31, 2015 and 2014 were based on the following assumptions:

	ThreeMonthsEnded December 31, 2015		ThreeMonthsEnded December 31, 2014
Risk-free interest rate	1.57% – 1.75%		1.63% – 1.66%
Expected life (years)		5.90		5.25
Expected volatility		83%		98%
Expected dividends	None		None

Stock Option Activity

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

	Number of Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in Years)
Outstanding, September 30, 2015		3,647,705		$	3.70		7.15
Granted		56,000		$	4.31
Exercised		(45,674	)	$	2.52
Cancelled		(36,178	)	$	3.52
Outstanding, December 31, 2015		3,621,853		$	3.73		6.92

RSU Activity

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

	Number of Shares			Weighted-Average FairMarketValue Per Share
Outstanding, September 30, 2015		802,917		$	4.49
Granted		1,083,000		$	4.31
Settled		(94,077	)	$	3.38
Cancelled		(22,252	)	$	3.85
Outstanding, December 31, 2015		1,769,588		$	4.37