Long-Term Debt (Detail Textuals ) (USD $)			3 Months Ended
	Mar. 31, 2014 Line of credit	Dec. 31, 2013 Line of credit	Mar. 31, 2014 Industrial Development Revenue Bonds Letter of credit from bank
Debt Instrument [Line Items]
Annual sinking fund payments, commenced on December 1, 2000 through 2013			$ 170,000
Final sinking fund payment due December 1, 2014			2,620,000
Percentage of annual fee of secured amount			1.00%
Percentage of annual fee of principal amount outstanding			0.25%
Unsecured line of credit	$ 2,000,000	$ 2,000,000