Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Schedule of Property and Equipment

Depreciation is computed using the straight-line method over the following estimated useful lives:

	Years
Buildings		10-33
Trucks and automotive equipment		3-10
Shop machinery and equipment		3-10
Land improvements		10-15
Office equipment		3-10

Property and equipment consists of the following:
	December 31,
	2014		2013
Land and land improvements	$	580,612	$	598,926
Buildings	4,149,078		3,934,605
Machinery and equipment	7,011,943		8,997,995
Rental equipment	1,092,384		978,514
	12,834,017		14,510,040
Less: accumulated depreciation	8,727,406		10,187,045
	$	4,106,611	$	4,322,995