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Income Taxes (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Current: |  |  |
Federal | $ 4,301,000 | $ 3,752,000 | $ 4,259,000
State | 768,000 | 702,000 | 454,000
Current income taxes | 5,069,000 | 4,454,000 | 4,713,000
Deferred: |  |  |
Federal | 699,000 | 396,000 | 191,000
State | (89,000) | 56,000 | 115,000
Deferred income taxes | 610,066 | 451,702 | 305,830
Total income tax provision | 5,678,506 | 4,905,708 | 5,019,136
Net operating loss carryforwards for federal income tax | 1,300,000 |  |
Future benefit of the federal net operating loss carryforwards, limit per year | 300,000 |  |
Current deferred tax assets: |  |  |
Reserves | 383,000 | 377,000 |
Inventory capitalization | 205,000 | 230,000 |
Compensation programs | 245,000 | 262,000 |
Retirement liability | 55,000 | 72,000 |
Equity-based compensation | 228,000 | 228,000 |
Total current deferred tax assets | 1,115,959 | 1,168,749 |
Long-term deferred tax assets / (liabilities): |  |  |
Excess of book over tax basis of fixed assets | (1,688,000) | (1,421,000) |
Goodwill | (751,000) | (691,000) |
Intangible assets | (69,000) | (146,000) |
Total long-term deferred tax liabilities | (2,508,000) | (2,258,000) |
Net operating loss carryforwards | 443,000 | 544,000 |
Deferred rent | 67,000 | 64,000 |
Compensation programs | 408,000 | 358,000 |
Total long-term deferred tax assets | 918,000 | 966,000 |
Net long-term deferred tax liabilities | (1,590,000) | (1,292,000) |
Deferred tax assets | 2,034,000 |  |
Reconciliation of actual tax provision from expected tax provision |  |  |
Computed "expected" tax rate (as a percent) | 34.00% | 34.00% | 34.00%
Increase (decrease) in income taxes resulting from: |  |  |
State taxes, net of federal tax benefit (as a percent) | 2.70% | 3.40% | 2.00%
Meals and entertainment (as a percent) | 0.10% | 0.10% | 0.10%
R&D credits (as a percent) | (0.10%) | (0.40%) | (0.30%)
Domestic production deduction (as a percent) | (2.50%) | (2.80%) | (1.80%)
Non-deductible ISO stock option expense (as a percent) | 0.10% | 0.10% | 0.10%
Unrecognized tax benefits (as a percent) | (0.20%) | (2.40%) | 1.00%
Income of non-controlling interests (as a percent) |  | (1.00%) | (0.40%)
Other (as a percent) | 0.20% | 0.30% | 0.10%
Effective tax rate (as a percent) | 34.30% | 31.30% | 34.80%
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits (UTB) resulting from uncertain tax positions |  |  |
Gross UTB balance at beginning of fiscal year | 320,000 | 685,000 |
Increases for tax positions of prior years |  | 40,000 |
Reductions for tax positions of prior years | (30,000) | (405,000) |
Gross UTB balance at the end of fiscal year | 290,000 | 320,000 | 685,000
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate | 290,000 | 320,000 |
Amount of unrecognized tax benefits expected to be reduced | $ 265,000 |  |

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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817 + Details
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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by research tax credits generated or utilized under enacted tax laws during the period. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817 + Details
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- Definition The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to 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 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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