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Income Taxes (Tables) | 3 Months Ended
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Apr. 30, 2015
Income Tax Disclosure [Abstract] |
Company's Income Tax Expense Related to Continuing Operations | The Company’s income tax expense amounts for the three months ended April 30, 2015 and 2014 differed from the expected income tax expense amounts computed by applying the federal corporate income tax rate of 35% to income before income taxes for the periods as shown in the table below.
|  | Three Months Ended April 30, |
|  | 2015 |  |  | 2014 |
Computed expected income tax expense |  | $ | 5,499,000 |  |  | $ | 2,343,000 |
State income taxes, net of federal tax benefit |  |  | 815,000 |  |  |  | 300,000 |
Permanent differences, net |  |  | (1,436,000 | ) |  |  | (715,000 | )
Other, net |  |  | (17,000 | ) |  |  | (34,000 | )
|  | $ | 4,861,000 |  |  | $ | 1,894,000 |
Schedule of Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities | The tax effects of temporary differences that gave rise to deferred tax assets and liabilities as of April 30 and January 31, 2015 are presented below:
|  | April 30, |  |  | January 31, |
|  | 2015 |  |  | 2015 |
Assets: |  |  |  |  |  |  |  |
Stock options |  | $ | 1,816,000 |  |  | $ | 1,649,000 |
Purchased intangibles |  |  | 1,106,000 |  |  |  | 1,132,000 |
Accrued liabilities |  |  | 337,000 |  |  |  | 428,000 |
Other |  |  | 283,000 |  |  |  | 107,000 |
|  |  | 3,542,000 |  |  |  | 3,316,000 |
Liabilities: |  |  |  |  |  |  |  |
Purchased intangibles |  | $ | (3,048,000 | ) |  | $ | (2,931,000 | )
Construction contracts |  |  | (842,000 | ) |  |  | (830,000 | )
Property and equipment |  |  | (503,000 | ) |  |  | (533,000 | )
Other |  |  | (30,000 | ) |  |  | (32,000 | )
|  |  | (4,423,000 | ) |  |  | (4,326,000 | )
Net deferred tax liabilities |  | $ | (881,000 | ) |  | $ | (1,010,000 | )

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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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