Credit Facility (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]
Borrowings under credit facility, interest payable description	at either (i) the bank’s prime rate or (ii) LIBOR plus 2.25%
Credit Facility (Textual) [Abstract]
Borrowings under credit facility, interest related to Libor rate	2.25%
Credit facility, total	$ 0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving line of credit		15,000,000
Revolving line of credit, maturity date	Dec. 05, 2013
Secured Debt [Member]
Line of Credit Facility [Line Items]
Equipment term loan		12,500,000
Borrowings under credit facility, interest payable description	applicable interest rate was LIBOR plus 2.25% (2.5% as of June 30, 2012)
Revolving line of credit, maturity date	Apr. 30, 2015
Equipment term loan payable term	36 months
Equipment term loan, outstanding	4,900,000
Equipment term loan, interest rate	2.50%
Equipment term loan, drew down to fund capital expenditures	$ 5,000,000