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QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)
12 Months Ended
Dec. 31, 2012
QUARTERLY FINANCIAL DATA (UNAUDITED) [Abstract]  
Quarterly financial data
The results of any single quarter are not necessarily indicative of the Company's results for the full year. Earnings per share data is computed independently for each of the periods presented. As a result, the sum of the earnings per share amounts for the quarter may not equal the total for the year.

   
Quarter ended
 
2012
March 31,
June 30,
September30,
December 31,
Revenue
19,721,095
20,854,627
21,340,831
27,356,029
Gross Profit
4,964,386
5,768,644
5,804,424
7,695,159
Net Income
1,919,320
2,696,019
2,795,437
3,600,354
Earning per share
       
Basic
0.28
0.37
0.33
0.43
Diluted
0.27
0.36
0.33
0.43
         
2011
       
Revenue
16,009,608
17,426,223
16,607,638
24,092,200
Gross Profit
3,850,104
4,244,801
4,167,605
6,547,430
Net Income
1,368,050
1,570,816
1,805,042
2,673,020
Earning per share
       
Basic
0.20
0.23
0.26
0.39
Diluted
0.19
0.22
0.25
0.37