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Summarized Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2015
Summarized Quarterly Financial Data (Unaudited) [Abstract]  
Schedule of quarterly financial information
  Quarter 
2015 First  Second  Third  Fourth 
Revenues $26,504,344  $41,283,142  $32,406,877  $35,108,810 
Gross Profit  4,986,733   10,483,514   6,416,561   5,973,797 
Income from Operations  3,280,340   8,649,545   2,601,779   3,665,106 
Net income  2,105,489   5,590,530   1,685,897   2,160,289 
Net income per share:                
Basic $0.10  $0.28  $0.08  $0.11 
Diluted $0.10  $0.28  $0.08  $0.11 

 

  
  Quarter 
2014 First  Second  Third  Fourth 
Revenues $25,753,864  $37,836,265  $40,754,205 $32,697,113 
Gross Profit  4,670,836   6,121,007   6,410,848   5,575,457 
Income from Operations  3,761,920   5,131,707   4,929,301   3,589,978 
Net income  2,533,294   3,572,107   3,372,944   2,228,015 
Net income per share:               
Basic $0.13  $0.19  $0.18  $0.11 
Diluted $0.13  $0.19  $0.18  $0.11