Accounts Receivable

9 Months Ended

Sep. 30, 2011

Receivables [Abstract]

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

Accounts Receivable

Accounts Receivable is shown net of the allowance for doubtful accounts of $3,308,000 and $2,852,000 at September 30, 2011 and December 31, 2010, respectively.