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Liquidity (Tables)
12 Months Ended
Dec. 31, 2018
Liquidity [Member]  
Liquidity [Line Items]  
Schedule of expects to satisfy remaining unsatisfied performance obligation

   
2018


Within 1 year
$ 22,563,674

1 to 2 years


54,639,417

Thereafter


20,454,288


Total Backlog
$ 97,657,379