Condensed Statements of Operations and Comprehensive Income (Loss) (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue	$ 21,487,677	$ 20,664,645	$ 19,619,571	$ 61,702,530
Cost of sales	17,016,373	16,188,518	53,620,290	48,549,586
Gross profit (loss)	4,471,304	4,476,127	(34,000,719)	13,152,944
Selling, general and administrative expenses	1,800,878	1,508,656	5,424,581	4,882,851
Income (loss) from operations	2,670,426	2,967,471	(39,425,300)	8,270,093
Interest expense	67,879	195,371	370,234	492,443
Income (loss) before provision for (benefit from) income taxes	2,602,547	2,772,100	(39,795,534)	7,777,650
Provision for (benefit from) income taxes	905,000	861,000	(12,869,000)	2,411,000
Net income (loss)	1,697,547	1,911,100	(26,926,534)	5,366,650
Other comprehensive income (loss), net of tax -
Change in unrealized gain interest rate swap	5,095		9,727	17,390
Comprehensive income (loss)	$ 1,702,642	$ 1,911,100	$ (26,916,807)	$ 5,384,040
Income (loss) per common share – basic (in Dollars per share)	$ 0.20	$ 0.23	$ (3.18)	$ 0.64
Income (loss) per common share – diluted (in Dollars per share)	$ 0.20	$ 0.23	$ (3.18)	$ 0.63
Shares used in computing income (loss) per common share:
Basic (in Shares)	8,483,111	8,391,954	8,459,028	8,387,240
Diluted (in Shares)	8,545,889	8,490,711	8,459,028	8,464,350