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Note 2 - Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements Policy (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Accrued compensation and tax withholdings |  | $ (7,831) | $ (23,649) |  | $ (17,682) | $ (4,184) | $ (19,055) | $ 11,404
Other current assets and liabilities | $ 3,910 | 1,379 |  | $ 383 | (33,944) | (2,487) | (33,655) | 913
Net cash provided by operating activities | 13,756 | 22,371 | (41,022) | 32,151 | (21,640) | 50,289 | 7,158 | (466,046)
Proceeds from issuance of common stock |  | 1,678 | 1,852 |  | 1,852 | 3,279 | 3,621 | 5,245
Net cash used in financing activities |  | (185,542) | (503,284) |  | (675,369) | (659,207) | (840,459) | (62,762)
Effects of exchange rate changes on cash and cash equivalents | 24,548 | 16,255 |  | 15,596 | 62,976 | 21,124 | 44,666 | (180,819)
Purchases of property, plant and equipment included in accounts payable and accrued expenses | 2,164 | 2,270 | 3,040 | 2,575 | 2,898 | $ 2,767 | 2,725 | $ 10,196
Previously Reported [Member] |  |  |  |  |  |  |  |
Accrued compensation and tax withholdings |  | (6,153) | (21,797) |  | (15,830) |  | (15,434) |
Other current assets and liabilities | 15,957 | 12,913 |  | 7,484 | (36,578) |  | (26,944) |
Net cash provided by operating activities | 26,431 | 34,787 | (39,170) | 36,578 | (22,422) |  | 17,490 |
Proceeds from issuance of common stock |  | 0 | 0 |  | 0 |  | 0 |
Net cash used in financing activities |  | (187,220) | (505,136) |  | (677,221) |  | (844,080) |
Effects of exchange rate changes on cash and cash equivalents | 12,501 | 4,721 |  | 8,495 | 65,610 |  | 37,955 |
Purchases of property, plant and equipment included in accounts payable and accrued expenses | 0 | 0 | 0 | 2,203 | 0 |  | 0 |
Revision of Prior Period, Error Correction, Adjustment [Member] |  |  |  |  |  |  |  |
Accrued compensation and tax withholdings |  | (1,678) | (1,852) |  | (1,852) |  | (3,621) |
Other current assets and liabilities | (12,047) | (11,534) |  | (7,101) | 2,634 |  | (6,711) |
Net cash provided by operating activities | (12,675) | (12,416) | (1,852) | (4,427) | 782 |  | (10,332) |
Proceeds from issuance of common stock |  | 1,678 | 1,852 |  | 1,852 |  | 3,621 |
Net cash used in financing activities |  | 1,678 | 1,852 |  | 1,852 |  | 3,621 |
Effects of exchange rate changes on cash and cash equivalents | 12,047 | 11,534 |  | 7,101 | (2,634) |  | 6,711 |
Purchases of property, plant and equipment included in accounts payable and accrued expenses | $ 2,164 | $ 2,270 | $ 3,040 | $ 372 | $ 2,898 |  | $ 2,725 |

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