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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Tax Disclosure [Abstract] |
Reconciliation of Income Tax | A reconciliation of the U.S. federal statutory tax rate to our income tax (expense) benefit from continuing operations for 2021 and 2020, is as follows (in thousands):
|  | Years Ended December 31, |
|  | 2021 |  |  | 2020 |
U.S. statutory rate |  |  | 21.0 | % |  |  | 21.0 | %
Increase (decrease) resulting from: |  |  |  |  |  |  |  |
Permanent differences |  |  | (3.1 | )% |  |  | (0.1 | )%
State income taxes |  |  | 0.5 | % |  |  | 0.4 | %
Other |  |  | (0.1 | )% |  |  | (0.2 | )%
Discrete items |  |  |  |  |  |  |  |
Vesting of common stock |  |  | (1.4 | )% |  |  | (1.4 | )%
Change in valuation allowance |  |  | (44.3 | )% |  |  | (36.2 | )%
PPP Loan forgiveness |  |  | 39.5 | % |  |  | — |
Return to provision and other |  |  | (11.6 | )% |  |  | 16.9 | %
Income tax (expense) benefit |  |  | 0.5 | % |  |  | 0.4 | %
Components of Income Tax Expense | Significant components of our income tax (expense) benefit from continuing operations for 2021 and 2020, were as follows (in thousands):
|  | Years Ended December 31, |
|  | 2021 |  |  | 2020 |
Current |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |
State |  |  | — |  |  |  | (20 | )
Total current |  |  | — |  |  |  | (20 | )
Deferred |  |  |  |  |  |  |  |
Federal |  |  | 2,185 |  |  |  | 2,722 |
State |  |  | (20 | ) |  |  | 2,455 |
Valuation allowance |  |  | (2,141 | ) |  |  | (5,105 | )
Total deferred |  |  | 24 |  |  |  | 72 |
Income tax (expense) benefit |  | $ | 24 |  |  | $ | 52 |
Components of Deferred Tax Assets and Liabilities | Significant components of our deferred tax assets and liabilities at December 31, 2021 and 2020, were as follows (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Deferred tax assets |  |  |  |  |  |  |  |
Leases |  | $ | 233 |  |  | $ | 319 |
Employee benefits |  |  | 1,208 |  |  |  | 1,471 |
Accrued losses on uncompleted contracts |  |  | 2,572 |  |  |  | 3,015 |
Stock based compensation expense |  |  | 247 |  |  |  | 225 |
Federal net operating losses |  |  | 21,724 |  |  |  | 19,345 |
State net operating losses |  |  | 3,299 |  |  |  | 3,620 |
R&D and other tax credits |  |  | 938 |  |  |  | 806 |
Other |  |  | 545 |  |  |  | 398 |
Total deferred tax assets |  |  | 30,766 |  |  |  | 29,199 |
Deferred tax liabilities |  |  |  |  |  |  |  |
Property, plant and equipment and AHFS |  |  | (1,285 | ) |  |  | (2,632 | )
Prepaid insurance |  |  | (231 | ) |  |  | (511 | )
Total deferred tax liabilities |  |  | (1,516 | ) |  |  | (3,143 | )
Net deferred tax assets |  |  | 29,250 |  |  |  | 26,056 |
Valuation allowance |  |  | (29,331 | ) |  |  | (26,168 | )
Net deferred taxes (1) |  | $ | (81 | ) |  | $ | (112 | )
| (1) | Amounts are included in other noncurrent liabilities on our Balance Sheet.

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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