Stockholders' Equity (Tables)

12 Months Ended

Sep. 30, 2020

Equity [Abstract]

Schedule of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense related to RSUs, stock options, and ESPP shares for the fiscal years ended September 30, 2020, 2019, and 2018, which were allocated as follows (amounts shown in thousands):

	2020		2019		2018
Cost of revenue	$	267	$	207	$	78
Selling and marketing	2,528		2,554		2,383
Research and development	2,802		2,426		2,074
General and administrative	3,954		4,450		4,415
Stock-based compensation expense included in expenses	$	9,551	$	9,637	$	8,950

Schedule of Fair Value Calculations for Stock-Based Compensation Awards

The fair value calculations for stock-based compensation awards to employees for the fiscal years ended September 30, 2020, 2019, and 2018 were based on the following assumptions:

	2020	2019	2018
Risk-free interest rate	1.35% – 1.35%	1.85% – 3.08%	2.04%
Expected life (years)	5.78	5.43	5.15
Expected volatility	48%	57%	60%
Expected dividends	—	—	—

Schedule of Stock Option Activity

The following table summarizes stock option activity under the Company’s stock option plans during the fiscal years ended September 30, 2020, 2019, and 2018: 

	Number of Shares	Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in Years)
Outstanding at September 30, 2017	2,845,866	$	4.21	5.4
Granted	299,397	$	8.60
Exercised	(250,823)	$	2.96
Canceled	(88,076)	$	5.23
Outstanding at September 30, 2018	2,806,364	$	4.75	4.6
Granted	409,368	$	9.59
Exercised	(1,384,647)	$	3.25
Canceled	(144,183)	$	6.62
Outstanding at September 30, 2019	1,686,902	$	7.00	5.4
Granted	92,610	$	9.49
Exercised	(580,861)	$	6.15
Canceled	(36,146)	$	10.76
Outstanding at September 30, 2020	1,162,505	$	7.51	6.1
Vested and Expected to Vest at September 30, 2020	1,162,505	$	7.51	6.1
Exercisable at September 30, 2020	775,861	$	6.54	5.0

Schedule of RSU Activity

The following table summarizes RSU activity under the Company’s equity plans in the fiscal years ended September 30, 2020, 2019, and 2018:

	Number of Shares	Weighted- Average Fair Value Per Share
Outstanding at September 30, 2017	2,357,021	$	5.65
Granted	1,184,906	$	8.54
Settled	(745,197)	$	5.26
Canceled	(216,554)	$	7.39
Outstanding at September 30, 2018	2,580,176	$	6.92
Granted	1,147,976	$	9.67
Settled	(881,420)	$	6.53
Canceled	(494,245)	$	7.70
Outstanding at September 30, 2019	2,352,487	$	8.26
Granted	1,394,869	$	7.39
Settled	(818,665)	$	7.82
Canceled	(266,748)	$	8.26
Outstanding at September 30, 2020	2,661,943	$	7.95

Schedule of Performance RSU Activity

The following table summarizes Performance RSU activity under the Company’s equity plans in the fiscal years ended September 30, 2020, 2019, and 2018:

	Number of Shares	Weighted- Average Fair Value Per Share
Outstanding at September 30, 2017	2,100,000	$	7.71
Granted	—	$	—
Exercised	—	$	—
Canceled	(57,183)	$	9.45
Outstanding at September 30, 2018	2,042,817	$	7.66
Granted	—	$	—
Exercised	—	$	—
Canceled	(320,266)	$	7.11
Outstanding at September 30, 2019	1,722,551	$	7.76
Granted	353,556	$	6.06
Exercised	—	$	—
Canceled	(1,722,551)	$	7.76
Outstanding at September 30, 2020	353,556	$	6.06