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Stockholders' Equity (Tables)
3 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Stock-Based Compensation Expense Related to Stock Options and RSUs
The following table summarizes stock-based compensation expense related to RSUs, stock options, and ESPP shares, which was allocated as follows (amounts shown in thousands):
Three Months Ended December 31,
 20192018
Cost of revenue$61  $44  
Selling and marketing668  791  
Research and development578  434  
General and administrative996  1,401  
Stock-based compensation expense included in expenses
$2,303  $2,670  
Schedule of 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, 2018 were based on the following assumptions:
 Three Months Ended December 31, 2018
Risk-free interest rate
2.88% – 3.08%
Expected life (years)5.57
Expected volatility57%  
Expected dividendsNone  
Schedule of Stock Option Activity
The following table summarizes stock option activity under the Company’s equity plans during the three months ended December 31, 2019:
Number of
Shares
Weighted-Average
Exercise Price
Weighted-Average
Remaining
Contractual Term
(in Years)
Aggregate Intrinsic Value
(in thousands)
Outstanding at September 30, 20191,686,902  $7.00  5.4$4,882  
Granted—  $—  
Exercised(23,318) $3.06  
Canceled(3,000) $6.60  
Outstanding at December 31, 20191,660,584  $7.06  5.2$3,094  
Vested and Expected to Vest at December 31, 20191,660,584  $7.06  5.2$3,094  
Exercisable at December 31, 20191,271,464  $6.36  4.2$3,077  
Schedule of RSU Activity
The following table summarizes RSU activity under the Company’s equity plans during the three months ended December 31, 2019:
 
Number of
Shares
Weighted-Average
Fair Market Value
Per Share
Outstanding at September 30, 20192,352,487  $8.26  
Granted936,388  $7.19  
Settled(473,914) $7.61  
Canceled(69,739) $8.96  
Outstanding at December 31, 20192,745,222  $7.99