Quarterly report pursuant to Section 13 or 15(d)

Construction Backlog (Details Textual)

v3.19.1
Construction Backlog (Details Textual)
3 Months Ended
Mar. 31, 2019
USD ($)
Number
Mar. 31, 2018
USD ($)
Number
Sep. 30, 2017
USD ($)
Construction Backlog (Textual)      
Total Remaining Unsatisfied Performance Obligations $ 95,839,840    
Construction backlog contract amount $ 55 $ 25,000,000 $ 15
Number of large contracts | Number 2 1  
Moved Contract [Member]      
Construction Backlog (Textual)      
Construction backlog contract amount $ 27,500,000