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CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) [Abstract]
Revenue	$ 20,664,645	$ 21,340,831	$ 61,702,530	$ 61,916,552
Cost of sales	16,188,518	15,536,407	48,549,586	45,379,099
Gross profit	4,476,127	5,804,424	13,152,944	16,537,453
Selling, general and administrative expenses	1,508,656	1,615,888	4,882,851	5,290,999
Income from operations	2,967,471	4,188,536	8,270,093	11,246,454
Interest expense	195,371	163,099	492,443	486,679
Income before provision for income taxes	2,772,100	4,025,437	7,777,650	10,759,775
Provision for income taxes	861,000	1,230,000	2,411,000	3,349,000
Net income	1,911,100	2,795,437	5,366,650	7,410,775
Other comprehensive income (loss), net of tax
Change in unrealized gain (loss)- interest rate swap	0	(1,490)	17,390	(33,826)
Comprehensive Income	$ 1,911,100	$ 2,793,947	$ 5,384,040	$ 7,376,949
Income per common share - basic (in dollars per share)	$ 0.23	$ 0.33	$ 0.64	$ 0.99
Income per common share - diluted (in dollars per share)	$ 0.23	$ 0.33	$ 0.63	$ 0.96
Shares used in computing income per common share:
Basic (in shares)	8,391,954	8,347,086	8,387,240	7,510,581
Diluted (in shares)	8,490,711	8,476,691	8,464,350	7,684,508

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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