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Stock-Based Compensation (Tables)
12 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Summary of Stock-Based Compensation Expense The following table summarizes the operating expense line in which stock-based compensation expense has been recorded and the impact on net income in the consolidated statements of operations for the years ended September 30, 2022, 2021 and 2020:
 Year Ended September 30,
202220212020
Educational services and facilities$240 $60 $64 
Selling, general and administrative4,172 1,748 2,013 
Total stock-based compensation expense$4,412 $1,808 $2,077 
Income tax benefit$1,103 $452 $519 
Summary of Stock Option Activity
The following table summarizes stock option activity under the Former Plans and the 2021 Plan for the years ended September 30, 2022, 2021 and 2020:
Number of 
Shares
Weighted
Average 
Exercise
Price
Weighted
Average
Remaining
Contractual
Life
Aggregate
Intrinsic
Value
(In thousands)(per Share)(Years)
Outstanding as of September 30, 2018— $— — $— 
Granted210 $3.14 
Outstanding as of September 30, 2019210 $3.14 6.19$483 
Outstanding as of September 30, 2020210 $3.14 5.18$407 
Outstanding as of September 30, 2021210 $3.14 4.18$760 
Outstanding as of September 30, 2022210 $3.14 3.18$483 
Stock options exercisable as of September 30, 2022210 $3.14 3.18$483 
Summary of Restricted Stock Units and Performance Units Activity
The following table summarizes the activity for RSUs and PSUs granted under the Former Plans and 2021 Plan for the years ended September 30, 2022, 2021 and 2020:
RSUsPSUs
Number of 
Shares
(In thousands)
Weighted Average
Grant Date
Fair Value
per Share
Number of 
Shares
(In thousands)
Weighted Average
Grant Date
Fair Value
per Share
Outstanding as of September 30, 2019236 $2.74 133 $2.40 
Granted306 $7.46 314 $7.72 
Adjustment to grant based on achieved attainment level— $— 33 
Vested(141)$2.62 (100)$2.32 
Forfeited(63)$2.96 (39)$2.48 
Outstanding as of September 30, 2020338 $7.01 341 $7.30 
Granted376 $6.11 371 $6.37 
Adjustment to grant based on achieved attainment level— $— 11 $— 
Vested(130)$6.31 (39)$2.48 
Forfeited(36)$6.90 (42)$7.30 
Outstanding as of September 30, 2021548 $6.56 642 $6.97 
Granted377 $8.34 377 $8.75 
Adjustment to grant based on achieved attainment level— $— (256)$— 
Vested(209)$6.69 (24)$7.73 
Forfeited(21)$7.21 (23)$7.14 
Outstanding as of September 30, 2022695 $7.47 716 $7.60