Quarterly report pursuant to Section 13 or 15(d)

Liquidity (Details)

v3.19.1
Liquidity (Details)
Mar. 31, 2019
USD ($)
Liquidity [Line Items]  
Total Remaining Unsatisfied Performance Obligations $ 95,839,840
Liquidity [Member] | Within 1 year [Member]  
Liquidity [Line Items]  
Total Remaining Unsatisfied Performance Obligations 20,847,051
Liquidity [Member] | 1 to 2 years [Member]  
Liquidity [Line Items]  
Total Remaining Unsatisfied Performance Obligations 54,546,876
Liquidity [Member] | Thereafter [Memebr]  
Liquidity [Line Items]  
Total Remaining Unsatisfied Performance Obligations $ 20,445,913