Subsequent Events Subsequent Events (Details)		6 Months Ended
	Jul. 21, 2016 USD ($) ft² a	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Subsequent Event [Line Items]
Purchases of property and equipment		$ 1,260,659	$ 506,893
Subsequent Event [Member] | Precast Concrete Production Facility in Columbia, South Carolina [Member]
Subsequent Event [Line Items]
Purchases of property and equipment	$ 1,550,000
Area of land (in acres) | a	39
Area of facility purchased (in sqft) | ft²	40,000
Subsequent Event [Member] | Notes Payable to Banks [Member] | Precast Concrete Production Facility in Columbia, South Carolina [Member]
Subsequent Event [Line Items]
Debt instrument, term (in years)	15 years
Debt instrument, face amount	$ 1,317,500
Debt instrument, interest rate	5.29%
Debt instrument monthly payment	$ 10,672.91