Long-Term Debt (Detail Textuals) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Industrial Development Revenue Bonds; secured by an equivalent letter of credit from a bank with interest payable monthly at a floating rate (0.38% at December 31, 2012)(A) | Letter of credit from bank
Debt Instrument [Line Items]
Percentage of floating interest rate payable	0.38%
Secured term loan payable to a government agency; monthly payments of $1,950 including interest fixed at 3% payable through fourth quarter of 2015
Debt Instrument [Line Items]
Percentage of fixed interest rate payable	3.00%
Monthly principal payments	$ 1,950
Frequency of principal payments	Monthly
Secured term loan payable to a government agency; monthly principal payments of approximately $2,200 with interest waived payable through second quarter of 2012
Debt Instrument [Line Items]
Monthly principal payments	$ 2,200
Frequency of principal payments	Monthly