Quarterly report pursuant to Section 13 or 15(d)

Construction Backlog (Details 1)

v3.20.2
Construction Backlog (Details 1)
Jun. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total remaining unsatisfied performance obligations $ 17,293,227
Within 1 year [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total remaining unsatisfied performance obligations 4,436,977
1 to 2 years [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total remaining unsatisfied performance obligations 10,285,000
Thereafter [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total remaining unsatisfied performance obligations $ 2,571,250