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Consolidated Statements Of (Loss) Income And Comprehensive (Loss) Income (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Consolidated Statements Of (Loss) Income And Comprehensive (Loss) Income [Abstract] |  |  |
Sales | $ 131,319,510 | $ 104,249,654 | $ 143,775,051
Costs and expenses: |  |  |
Cost of sales | 86,420,982 | 62,752,763 | 84,879,924
Selling, general and administrative expenses | 36,742,869 | 38,100,773 | 40,108,221
Impairment loss | 5,849,853 |  | 1,271,986
Restructuring expense | 1,149,439 |  |
Total costs and expenses | 130,163,143 | 100,853,536 | 126,260,131
Operating income | 1,156,367 | 3,396,118 | 17,514,920
Other income and (expenses): |  |  |
Investment and other income | 125,985 | 75,187 | 313,544
(Loss)/gain on sale of assets | (73,126) | 62,630 | (27,081)
Interest and other expense | (106,101) | (136,255) | (181,393)
Other income (loss), net | (53,242) | 1,562 | 105,070
Income from operations before income taxes | 1,103,125 | 3,397,680 | 17,619,990
Income tax expense | 2,061,013 | 1,159,566 | 7,822,124
Net (loss) income | (957,888) | 2,238,114 | 9,797,866
Other comprehensive income (loss), net of tax: |  |  |
Additional minimum pension liability adjustments | 37,000 | 1,311,000 | (525,000)
Unrealized (losses)/gains on available-for-sale securities | (21,964) | 26,223 | (16,691)
Foreign currency translation adjustment | 333,000 | (2,032,877) | 934,934
Total other comprehensive (loss) income | 348,036 | (695,654) | 393,243
Comprehensive (loss) income | $ (609,852) | $ 1,542,460 | $ 10,191,109
Basic net (loss) income per share: | $ (0.11) | $ 0.26 | $ 1.16
Diluted net (loss) income per share: | $ (0.11) | $ 0.26 | $ 1.15
Weighted Average Basic Shares Outstanding | 8,531,073 | 8,508,497 | 8,448,612
Weighted Average Dilutive Shares Outstanding | 8,531,073 | 8,518,613 | 8,495,873

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