Property and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Property, Plant and Equipment [Table Text Block]

		2015			2014
Operating equipment	$	25,030,991		$	25,856,799
Vehicles		655,413			691,990
Office equipment		144,376			146,193
Buildings		12,041,660			12,700,884
Total property and equipment		37,872,440			39,395,866
Less accumulated depreciation		(15,854,248	)		(13,523,233	)
Property and equipment, net	$	22,018,192		$	25,872,633