Quarterly report pursuant to Section 13 or 15(d)

Construction Backlog (Details 1)

v3.19.1
Construction Backlog (Details 1)
Mar. 31, 2019
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Remaining Unsatisfied Performance Obligations $ 95,839,840
Within 1 year [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Remaining Unsatisfied Performance Obligations 20,847,051
1 to 2 years [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Remaining Unsatisfied Performance Obligations 54,546,876
Thereafter [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Remaining Unsatisfied Performance Obligations $ 20,445,913