CONDENSED INCOME STATEMENTS (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONDENSED INCOME STATEMENTS
Revenue	$ 17,426,223	$ 12,544,625	$ 33,435,831	$ 23,550,154
Cost of sales	13,181,422	9,193,296	25,340,926	17,449,743
Gross profit	4,244,801	3,351,329	8,094,905	6,100,411
Selling, general and administrative expenses	2,082,464	1,484,741	3,882,887	2,870,368
Income from operations	2,162,337	1,866,588	4,212,018	3,230,043
Interest expense	67,521	40,334	105,153	99,975
Income before provision for income taxes	2,094,816	1,826,254	4,106,865	3,130,068
Provision for income taxes	524,000	621,000	1,168,000	1,064,000
Net income	$ 1,570,816	$ 1,205,254	$ 2,938,865	$ 2,066,068
Income per common share - basic (in dollars per share)	$ 0.23	$ 0.18	$ 0.43	$ 0.33
Income per common share - diluted (in dollars per share)	$ 0.22	$ 0.18	$ 0.41	$ 0.32
Basic (in shares)	6,847,357	6,558,316	6,821,437	6,299,284
Diluted (in shares)	7,148,591	6,790,911	7,124,603	6,465,290