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Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income/(Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance at Apr. 30, 2018 | $ 422,148 | $ 72 | $ 253,616 | $ 389,146 | $ 1,689 | $ (222,375)
Balance (in shares) at Apr. 30, 2018 |  | 72,434,000 |  |  |  |
Treasury stock, shares at Apr. 30, 2018 |  |  |  |  |  | 18,167,000
Proceeds from exercise of employee stock options | $ 215 |  | 215 |  |  |
Proceeds from exercise of employee stock options (in shares) | 32,899 | 33,000 |  |  |  |
Stock-based compensation | $ 6,070 |  | 6,070 |  |  |
Shares issued under employee stock purchase plan | 943 |  | 943 |  |  |
Shares issued under employee stock (in shares) |  | 108,000 |  |  |  |
Change in unrealized loss on interest rate swap, net of tax effect | (734) |  |  |  | (734) |
Impact of adoption of accounting standard updates | (4,610) |  |  | (4,610) |  |
Issuance of common stock under restricted stock unit awards, net of shares surrendered | (631) | $ 1 | (632) |  |  |
Issuance of common stock under restricted stock unit awards, net of shares surrendered (in shares) |  | 140,000 |  |  |  |
Net income (loss) | 8,586 |  |  | 8,586 |  |
Balance at Jan. 31, 2019 | 431,987 | $ 73 | 260,212 | 393,122 | 955 | $ (222,375)
Balance (in shares) at Jan. 31, 2019 |  | 72,715,000 |  |  |  |
Treasury stock, shares at Jan. 31, 2019 |  |  |  |  |  | 18,167,000
Balance at Oct. 31, 2018 | $ 436,242 | $ 73 | 258,126 | 398,846 | 1,572 | $ (222,375)
Balance (in shares) at Oct. 31, 2018 |  | 72,706,000 |  |  |  |
Treasury stock, shares at Oct. 31, 2018 |  |  |  |  |  | 18,167,000
Proceeds from exercise of employee stock options (in shares) | 0 |  |  |  |  |
Stock-based compensation | $ 2,118 |  | 2,118 |  |  |
Change in unrealized loss on interest rate swap, net of tax effect | (617) |  |  |  | (617) |
Issuance of common stock under restricted stock unit awards, net of shares surrendered | (32) |  | (32) |  |  |
Issuance of common stock under restricted stock unit awards, net of shares surrendered (in shares) |  | 9,000 |  |  |  |
Other (rounding) | 1 |  |  | 1 |  |
Net income (loss) | (5,725) |  |  | (5,725) |  |
Balance at Jan. 31, 2019 | 431,987 | $ 73 | 260,212 | 393,122 | 955 | $ (222,375)
Balance (in shares) at Jan. 31, 2019 |  | 72,715,000 |  |  |  |
Treasury stock, shares at Jan. 31, 2019 |  |  |  |  |  | 18,167,000
Balance at Apr. 30, 2019 | $ 444,444 | $ 73 | 263,180 | 402,946 | 620 | $ (222,375)
Balance (in shares) at Apr. 30, 2019 | 54,696,762 | 72,864,000 |  |  |  |
Treasury stock, shares at Apr. 30, 2019 | 18,166,862 |  |  |  |  | 18,167,000
Proceeds from exercise of employee stock options | $ 74 |  | 74 |  |  |
Proceeds from exercise of employee stock options (in shares) | 15,000 | 15,000 |  |  |  |
Stock-based compensation | $ 1,344 |  | 1,344 |  |  |
Shares issued under employee stock purchase plan | 862 |  | 862 |  |  |
Shares issued under employee stock (in shares) |  | 173,000 |  |  |  |
Change in unrealized loss on interest rate swap, net of tax effect | (547) |  |  |  | (547) |
Issuance of common stock under restricted stock unit awards, net of shares surrendered | (594) |  | (594) |  |  |
Issuance of common stock under restricted stock unit awards, net of shares surrendered (in shares) |  | 183,000 |  |  |  |
Net income (loss) | 4,916 |  |  | 4,916 |  |
Balance at Jan. 31, 2020 | $ 450,499 | $ 73 | 264,866 | 407,862 | 73 | $ (222,375)
Balance (in shares) at Jan. 31, 2020 | 55,068,134 | 73,235,000 |  |  |  |
Treasury stock, shares at Jan. 31, 2020 | 18,166,862 |  |  |  |  | 18,167,000
Balance at Oct. 31, 2019 | $ 446,550 | $ 73 | 266,582 | 402,131 | 139 | $ (222,375)
Balance (in shares) at Oct. 31, 2019 |  | 73,226,000 |  |  |  |
Treasury stock, shares at Oct. 31, 2019 |  |  |  |  |  | 18,167,000
Proceeds from exercise of employee stock options (in shares) | 0 |  |  |  |  |
Stock-based compensation | $ (1,672) |  | (1,672) |  |  |
Change in unrealized loss on interest rate swap, net of tax effect | (66) |  |  |  | (66) |
Issuance of common stock under restricted stock unit awards, net of shares surrendered | (44) |  | (44) |  |  |
Issuance of common stock under restricted stock unit awards, net of shares surrendered (in shares) |  | 9,000 |  |  |  |
Net income (loss) | 5,731 |  |  | 5,731 |  |
Balance at Jan. 31, 2020 | $ 450,499 | $ 73 | $ 264,866 | $ 407,862 | $ 73 | $ (222,375)
Balance (in shares) at Jan. 31, 2020 | 55,068,134 | 73,235,000 |  |  |  |
Treasury stock, shares at Jan. 31, 2020 | 18,166,862 |  |  |  |  | 18,167,000

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