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Note 16 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2025
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Income tax benefit computed at federal statutory rate                         $ (1,500) $ (3,945) $ (4,129)
State income taxes, net of federal benefit                         (593) (598) (696)
Foreign income taxed at different rates                         953 (3,521) 1,477
Worthless stock deduction                         (45,600) 0 0
Impact of investments in subsidiaries                         (23,348) (22,583) (6,059)
Change in deferred tax asset valuation allowance                         36,475 31,793 (7)
Impact of change in uncertain tax positions                         (398) 36 (1,321)
Global intangible low taxed income, net of foreign tax credits                         4,914 3,767 310
Compensation                         1,353 1,413 1,484
Tax credits                         (1,538) (1,199) (1,425)
Other non-deductible expenses and other taxes                         (111) 1,461 1,069
Research and development expense deduction                         (1,280) (1,337) (1,277)
Income tax (benefit) expense $ (45,353) $ 2,635 $ 7,243 $ 3,874 $ 2,036 $ 573 $ 1,292 $ 1,340 $ 11,117 $ 2,632 $ 13,752 $ 3,205 (31,601) 5,241 (11,965)
Domestic Tax Jurisdiction [Member]                              
Impact of tax rate changes                         $ (928) $ (46) $ (1,391)