Quarterly report pursuant to Section 13 or 15(d)

Construction Backlog (Details 1)

v3.21.1
Construction Backlog (Details 1)
Mar. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Backlog $ 22,871,480
Within 1 year [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Backlog 10,015,230
1 to 2 years [Member]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Total Backlog $ 12,856,250