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Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of our deferred income (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax liabilities: |  |
Excess tax depreciation | $ (477) | $ (253)
ASC 892 Operating Lease Asset | (1,975) |
Total deferred tax liabilities | (2,452) | (253)
Deferred tax assets: |  |
Net operating loss carryforwards | 12,020 | 13,416
179 Carryforwards | 245 | 117
163(j) Business interest limitation carryforwards | 302 | 98
Deferred revenue |  | 202
Inventory and other allowances | 239 | 177
Excess (tax) book depreciation |  |
Excess (tax) book amortization | 60 | 59
174 research & experimental expenditures | 902 | 480
Share-based compensation | 530 | 394
Tax Credits | 118 |
ASC 892 Operating Lease Liability | 2,610 |
Other accrued costs | 13 | 238
Total deferred tax assets | 17,039 | 15,181
Less: Valuation allowance | (14,587) | (14,928)
Deferred income taxes |  |

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