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Consolidated Statements of Stockholders' Equity - USD ($) | Total | Common Stock | Treasury Stock, Common | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Sep. 30, 2020 | $ 371,500,000 | $ 355,000 | $ (55,109,000) | $ 279,741,000 | $ 170,330,000 | $ (23,817,000)
Beginning balance (in shares) at Sep. 30, 2020 |  | 35,513,000 | 6,353,000 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 10,366,000 |  |  |  | 10,366,000 |
Other comprehensive income (loss) | $ 1,071,000 |  |  |  |  | 1,071,000
Stock Issued During Period, Value, New Issues |  | $ 40,000 |  |  |  |
Stock Issued During Period, Shares, New Issues | 73,830,000 | 4,025,000 |  | 73,790,000 |  |
Other | $ (4,000) |  |  |  | (4,000) |
Employee stock purchase issuances (in shares) |  |  | (79,000) |  |  |
Employee stock purchase issuances | 1,214,000 |  | $ 694,000 | $ 520,000 |  |
Taxes paid for net share settlement of share-based payment awards (in shares) |  |  | 117,000 |  |  |
Taxes paid for net share settlement of share-based payment awards | (2,120,000) |  | $ (2,120,000) |  |  |
Issuance of stock under stock award plans (in shares) |  | 1,115,000 |  |  |  |
Issuance of stock under stock award plans | 8,525,000 | $ 12,000 |  | 8,513,000 |  |
Stock-based compensation expense | 8,135,000 |  |  | 8,135,000 |  |
Ending balance (in shares) at Sep. 30, 2021 |  | 40,653,000 | 6,391,000 |  |  |
Ending balance at Sep. 30, 2021 | 472,517,000 | $ 407,000 | $ (56,535,000) | 370,699,000 | 180,692,000 | (22,746,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 19,383,000 |  |  |  | 19,383,000 |
Other comprehensive income (loss) | $ (3,308,000) |  |  |  |  | (3,308,000)
Stock Issued During Period, Shares, New Issues | 4,025,000 |  |  |  |  |
Employee stock purchase issuances (in shares) |  |  | (80,000) |  |  |
Employee stock purchase issuances | $ 1,500,000 |  | $ 726,000 | 774,000 |  |
Taxes paid for net share settlement of share-based payment awards (in shares) |  |  | 102,000 |  |  |
Taxes paid for net share settlement of share-based payment awards | (6,662,000) |  | $ (2,363,000) | (4,299,000) |  |
Issuance of stock under stock award plans (in shares) |  | 1,297,000 |  |  |  |
Issuance of stock under stock award plans | 9,505,000 | $ 13,000 |  | 9,492,000 |  |
Stock-based compensation expense | 8,578,000 |  |  | 8,578,000 |  |
Ending balance (in shares) at Sep. 30, 2022 |  | 41,950,000 | 6,413,000 |  |  |
Ending balance at Sep. 30, 2022 | 501,513,000 | $ 420,000 | $ (58,172,000) | 385,244,000 | 200,075,000 | (26,054,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 24,770,000 |  |  |  | 24,770,000 |
Other comprehensive income (loss) | (957,000) |  |  |  |  | (957,000)
Employee stock purchase issuances (in shares) |  |  | (83,000) |  |  |
Employee stock purchase issuances | 2,263,000 |  | $ 787,000 | 1,476,000 |  |
Taxes paid for net share settlement of share-based payment awards (in shares) |  |  | 106,000 |  |  |
Taxes paid for net share settlement of share-based payment awards | (4,314,000) |  | $ (4,121,000) | (193,000) |  |
Issuance of stock under stock award plans (in shares) |  | 551,000 |  |  |  |
Issuance of stock under stock award plans | 3,927,000 | $ 5,000 |  | 3,922,000 |  |
Stock-based compensation expense | 13,286,000 |  |  | 13,286,000 |  |
Ending balance (in shares) at Sep. 30, 2023 |  | 42,501,000 | 6,436,000 |  |  |
Ending balance at Sep. 30, 2023 | $ 540,488,000 | $ 425,000 | $ (61,506,000) | $ 403,735,000 | $ 224,845,000 | $ (27,011,000)

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