Sale of Certain Accounts Receivable (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Accounts receivable factoring, retained amount, Percentage	20.00%
Accounts receivable factoring, fee for first thirty days, Percentage	1.00%
Accounts receivable factoring, additional fee on average daily balance of net outstanding funds, prime rate, Percentage	3.25%	3.25%
Accounts receivable factoring agreement non recourse receivables	$ 2,000,000
Accounts receivable factoring agreement non recourse receivables, sublimit for single customer receivable	1,500,000
Proceeds from Sale of Finance Receivables	6,016,000	6,063,000
Trade Receivables Held-for-sale, Amount	952,000	860,000
Accounts receivable sold outstanding balance	277,000	180,000
Receivable from purchaser net of fees and advances	178,993	161,584
Interest expense financing receivable fee	$ 133,700	$ 133,800