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Note 15 - Income Tax Benefit - Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Compensation $ 43 $ 391
Inventory reserves 618 601
Self-insurance 65 70
Asset retirement obligation 316 323
Deferred revenue 3,693 4,081
Federal net operating loss carryforwards 15,240 9,360
State net operating loss carryforwards 2,765 1,884
Accrued expenses 742 2,648
Stock based compensation 24 24
Federal credit carryforwards 6,915 5,216
State credit carryforwards 676 687
Research & development costs 1,451 749
Derivative instruments 0 29
Capital loss carryforwards 1,898 1,241
Trading securities 0 656
Other 89 96
Subtotal deferred tax assets 34,535 28,056
Valuation Allowance (14,216) (7,392)
Total deferred tax assets 20,319 20,664
Derivative instruments (403) 0
LIFO inventory (3,957) (2,740)
Depreciation (14,978) (17,046)
Prepaid expenses (981) (878)
Total deferred tax liabilities (20,319) (20,664)
Net deferred tax liabilities $ 0 $ 0