Revolving Credit and Security Agreement (Details) (USD $)	6 Months Ended
	Jun. 30, 2012
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Revolving credit and security agreement (Textual) [Abstract]
Effective rate of interest	5.25%
Available credit under credit facility	$ 1,600,000
Outstanding borrowing	6,400,000
Commitment fee for capital source	80,000
Debt Instrument, Description of Variable Rate Basis	The libor shall be not less than 2.0% and replacing it with the libor shall be not less than 1.0%
Amended And Restated Credit Agreement [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Maximum [Member]
Line of Credit Facility [Line Items]
Current maximum principal amount of credit facility	8,000,000
Increase in line of credit faciltiy cap	10,000,000
Increased facility cap	9,000,000
Minimum [Member]
Line of Credit Facility [Line Items]
Current maximum principal amount of credit facility	5,000,000
Increase in line of credit faciltiy cap	1,000,000
Increased facility cap	$ 8,000,000
Due before march, 26 2013 [Member]
Line of Credit Facility [Line Items]
Minimum termination fee, percentage	2.50%
Due before march 26, 2014 [Member]
Line of Credit Facility [Line Items]
Minimum termination fee, percentage	1.50%
Due after march 26, 2014 [Member]
Line of Credit Facility [Line Items]
Minimum termination fee, percentage	0.50%