CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands |
12 Months Ended |
Apr. 30, 2023 |
Apr. 30, 2022 |
Apr. 30, 2021 |
| Preferred Stock [Member] |
|
|
|
| Statement [Line Items] |
|
|
|
| Beginning balance, value |
|
|
$ 2
|
| Beginning balance, shares |
|
|
1,648
|
| Cumulative-effect adjustment from modified retrospective adoption of ASU 2020-06 |
|
|
|
| Series E preferred stock dividends paid ($2.705 per share) |
|
|
|
| Conversion of Series E preferred stock to common stock |
|
|
|
| Conversion of Series E preferred stock to common stock, shares |
|
|
(28)
|
| Redemption of Series E preferred stock |
|
|
$ (2)
|
| Redemption of Series E preferred stock, shares |
|
|
(1,620)
|
| Common stock issued, net of issuance costs of $2,359 |
|
|
|
| Common stock issued under equity compensation plans |
|
|
|
| Equity component of convertible senior notes |
|
|
|
| Purchase of capped calls related to convertible senior notes |
|
|
|
| Stock-based compensation expense |
|
|
|
| Net income |
|
|
|
| Ending balance, value |
|
|
|
| Ending balance, shares |
|
|
|
| Common Stock [Member] |
|
|
|
| Statement [Line Items] |
|
|
|
| Beginning balance, value |
$ 62
|
$ 61
|
$ 56
|
| Beginning balance, shares |
61,807
|
61,069
|
56,483
|
| Cumulative-effect adjustment from modified retrospective adoption of ASU 2020-06 |
|
|
|
| Series E preferred stock dividends paid ($2.705 per share) |
|
|
|
| Conversion of Series E preferred stock to common stock |
|
|
|
| Conversion of Series E preferred stock to common stock, shares |
|
|
34
|
| Redemption of Series E preferred stock |
|
|
|
| Common stock issued, net of issuance costs of $2,359 |
|
|
$ 4
|
| Common stock issued, net of issuance costs of $2,359, shares |
|
|
3,833
|
| Common stock issued under equity compensation plans |
$ 1
|
$ 1
|
$ 1
|
| Common stock issued under equity compensation plans, shares |
885
|
738
|
719
|
| Equity component of convertible senior notes |
|
|
|
| Purchase of capped calls related to convertible senior notes |
|
|
|
| Stock-based compensation expense |
|
|
|
| Net income |
|
|
|
| Ending balance, value |
$ 63
|
$ 62
|
$ 61
|
| Ending balance, shares |
62,692
|
61,807
|
61,069
|
| Additional Paid-in Capital [Member] |
|
|
|
| Statement [Line Items] |
|
|
|
| Beginning balance, value |
$ 605,841
|
$ 637,534
|
$ 612,909
|
| Cumulative-effect adjustment from modified retrospective adoption of ASU 2020-06 |
|
(42,431)
|
|
| Series E preferred stock dividends paid ($2.705 per share) |
|
|
$ (4,455)
|
| Conversion of Series E preferred stock to common stock |
|
|
|
| Redemption of Series E preferred stock |
|
|
$ (40,488)
|
| Common stock issued, net of issuance costs of $2,359 |
|
|
32,137
|
| Common stock issued under equity compensation plans |
3,405
|
3,358
|
3,983
|
| Equity component of convertible senior notes |
|
|
42,431
|
| Purchase of capped calls related to convertible senior notes |
|
|
(12,837)
|
| Stock-based compensation expense |
10,978
|
7,380
|
3,854
|
| Net income |
|
|
|
| Ending balance, value |
620,224
|
605,841
|
637,534
|
| Retained Earnings [Member] |
|
|
|
| Statement [Line Items] |
|
|
|
| Beginning balance, value |
(431,377)
|
(559,859)
|
(571,071)
|
| Cumulative-effect adjustment from modified retrospective adoption of ASU 2020-06 |
|
810
|
|
| Series E preferred stock dividends paid ($2.705 per share) |
|
|
|
| Conversion of Series E preferred stock to common stock |
|
|
|
| Redemption of Series E preferred stock |
|
|
|
| Common stock issued, net of issuance costs of $2,359 |
|
|
|
| Common stock issued under equity compensation plans |
|
|
|
| Equity component of convertible senior notes |
|
|
|
| Purchase of capped calls related to convertible senior notes |
|
|
|
| Stock-based compensation expense |
|
|
|
| Net income |
560
|
127,672
|
11,212
|
| Ending balance, value |
(430,817)
|
(431,377)
|
(559,859)
|
| Beginning balance, value |
174,526
|
77,736
|
41,896
|
| Cumulative-effect adjustment from modified retrospective adoption of ASU 2020-06 |
|
(41,621)
|
|
| Series E preferred stock dividends paid ($2.705 per share) |
|
|
$ (4,455)
|
| Conversion of Series E preferred stock to common stock |
|
|
|
| Redemption of Series E preferred stock |
|
|
$ (40,490)
|
| Common stock issued, net of issuance costs of $2,359 |
|
|
32,141
|
| Common stock issued under equity compensation plans |
3,406
|
3,359
|
3,984
|
| Equity component of convertible senior notes |
|
|
42,431
|
| Purchase of capped calls related to convertible senior notes |
|
|
(12,837)
|
| Stock-based compensation expense |
10,978
|
7,380
|
3,854
|
| Net income |
560
|
127,672
|
11,212
|
| Ending balance, value |
$ 189,470
|
$ 174,526
|
$ 77,736
|