Liquidity (Details)	Jun. 30, 2019 USD ($)
Liquidity [Line Items]
Total Backlog	$ 70,768,733
Liquidity [Member] | Within 1 year [Member]
Liquidity [Line Items]
Total Backlog	14,324,626
Liquidity [Member] | 1 to 2 years [Member]
Liquidity [Line Items]
Total Backlog	34,500,000
Liquidity [Member] | Thereafter [Memebr]
Liquidity [Line Items]
Total Backlog	$ 21,944,107