Long-Term Debt - Summary of long term debt (Parentheticals) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Industrial Development Revenue Bonds | Letter of credit from bank
Debt Instrument [Line Items]
Percentage of floating interest rate payable	0.31%
Secured term loan payable to government agency
Debt Instrument [Line Items]
Frequency of principal payments	monthly
Monthly principal payments	$ 1,950
Percentage of fixed interest rate payable	3.00%