Stockholders' Equity (Tables)

3 Months Ended

Dec. 31, 2016

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 (amounts shown in thousands):

	Three Months Ended December 31,
	2016		2015
Cost of revenue	$	40	$	18
Sales and marketing		314		225
Research and development		213		181
General and administrative		518		565
Stock-based compensation expense included in expenses	$	1,085	$	989

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, 2016 and 2015 were based on the following assumptions:

	ThreeMonths Ended December 31, 2016		ThreeMonths Ended December 31, 2015
Risk-free interest rate	1.68% – 1.92%		1.57% – 1.75%
Expected life (years)		5.30		5.90
Expected volatility		78%		83%
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, 2016:

	Number of Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in Years)
Outstanding, September 30, 2016		3,015,374		$	3.95		6.4
Granted		101,800		$	6.10
Exercised		(5,760	)	$	3.02
Cancelled		(4,333	)	$	2.82
Outstanding, December 31, 2016		3,107,081		$	4.02		6.3

RSU Activity

The following table summarizes RSU activity under the Company’s equity plans during the three months ended December 31, 2016:

	Number of Shares			Weighted-Average FairMarket Value Per Share
Outstanding, September 30, 2016		2,046,169		$	4.90
Granted		891,185		$	5.77
Settled		(486,833	)	$	6.50
Cancelled		(15,000	)	$	5.59
Outstanding, December 31, 2016		2,435,521		$	5.27