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Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Net operating loss carryforwards $ 163,674 $ 171,274
Research and development and other tax credit carryforwards 13,837 13,464
Capitalized research and development costs 2,186 0
Accruals and reserves 5,644 5,366
Fixed assets and intangible assets 638 565
Other 1,993 1,432
Gross deferred tax assets 187,972 192,101
Valuation allowance (183,567) (186,618)
Total deferred tax assets 4,405 5,483
Amortization (2,011) (2,721)
Other (1,523) (1,835)
Total deferred tax liabilities (3,534) (4,556)
Net deferred tax assets $ 871 $ 927