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Income Taxes (Tables) | 12 Months Ended
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May 31, 2014
Income Tax Disclosure [Abstract] |
State Income Taxes and Changes in Deferred Tax Assets Valuation Allowance | The difference between the Corporation’s statutory federal income tax rate of 34 percent in fiscal 2014 and 2013, and the effective income tax rate is due primarily to state income taxes and changes in deferred tax assets valuation allowance and are as follows:
|  | Year ended May 31, |
|  | 2014 |  |  | 2013 |
|  | (Dollars in thousands) |
Income taxes at statutory federal rate |  | $ | (4,034 | ) |  | $ | (3,574 | )
State income taxes |  |  | 23 |  |  |  | 93 |
State net operating loss |  |  | (480 | ) |  |  | (605 | )
New Energy Efficient Home Credit |  |  | (137 | ) |  |  | (91 | )
Increase in deferred tax assets valuation allowance |  |  | 4,561 |  |  |  | 4,189 |
Other, net |  |  | 67 |  |  |  | (12 | )
Income tax benefit |  | $ | — |  |  | $ | — |
Effective tax rate |  |  | 0 | % |  |  | 0 | %
Components of Net Deferred Tax Assets | Components of the net deferred tax assets include:
|  | May 31, |
|  | 2014 |  |  | 2013 |
|  | (Dollars in thousands) |
Current deferred tax assets |  |  |  |  |  |  |  |
Accrued marketing programs |  | $ | 169 |  |  | $ | 55 |
Accrued warranty expense |  |  | 1,464 |  |  |  | 1,466 |
Accrued workers’ compensation |  |  | 650 |  |  |  | 638 |
Accrued vacation |  |  | 329 |  |  |  | 319 |
Other |  |  | 223 |  |  |  | 143 |
Gross current deferred tax assets |  |  | 2,835 |  |  |  | 2,621 |
Noncurrent deferred tax assets |  |  |  |  |  |  |  |
Liability for certain post-retirement benefits |  |  | 2,061 |  |  |  | 2,252 |
Accrued warranty expense |  |  | 792 |  |  |  | 876 |
Federal net operating loss carryforward |  |  | 30,488 |  |  |  | 26,616 |
Federal tax credit carryforward |  |  | 1,345 |  |  |  | 1,205 |
State net operating loss carryforward |  |  | 7,860 |  |  |  | 7,380 |
Depreciation |  |  | 854 |  |  |  | 735 |
Other |  |  | (32 | ) |  |  | (43 | )
Gross noncurrent deferred tax assets |  |  | 43,368 |  |  |  | 39,021 |
Total gross deferred tax assets |  |  | 46,203 |  |  |  | 41,642 |
Valuation allowance |  |  | (46,203 | ) |  |  | (41,642 | )
Net deferred tax assets |  | $ | — |  |  | $ | — |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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