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Summarized Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Schedule of quarterly financial information
  Quarter 
2018  First   Second   Third   Fourth 
Revenues  $1,888,194   $33,149,190   $26,723,657   $24,985,717 
Gross (loss) profit   (695,308)   3,015,422    1,259,343    2,240,944 
Loss from operations   (4,519,478)   (11,730)   (1,570,353)   (5,080,753)
Net (loss) income   (4,086,276)   109,994    (1,404,962)   (5,164,440)
Net income per share                    
Basic  $-0.19   $0.005   $-0.07   $-0.24 
Diluted  $-0.19   $0.005   $-0.07   $-0.24 

 

   Quarter 
2017  First   Second   Third   Fourth 
Revenues  $25,289,659   $22,787,683   $33,507,053   $35,439,183 
Gross profit   5,653,920    3,464,666    7,221,288    3,616,077 
Income from operations   2,871,578    764,016    2,719,550    (1,674,877)
Net income(loss)   1,707,869    15,917    1,572,335    (1,636,333)
Net income per share:                    
Basic  $0.08   $0.001   $0.07   $-0.076 
Diluted  $0.08   $0.001   $0.07   $-0.076