Construction Backlog (Details Textual)	3 Months Ended		12 Months Ended
	Mar. 31, 2018 USD ($) Number	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($) Number
Construction Backlog (Textual)
Total Remaining Unsatisfied Performance Obligations			$ 97,657,379
Construction backlog contract amount	$ 25,000,000	$ 15	$ 55
Number of large contracts | Number	1		2
Moved Contract [Member]
Construction Backlog (Textual)
Construction backlog contract amount			$ 27,500,000