Property and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,510,040	$ 13,765,907
Less: accumulated depreciation	10,187,045	9,716,429
Property and equipment, net	4,322,995	4,049,478
Depreciation expense	635,000	674,000
Land and land improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	598,926	553,063
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,934,605	3,923,852
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,997,995	8,299,962
Rental equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 978,514	$ 989,030