Accounts Receivable and Other Receivables (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Receivables [Abstract]
Accounts Receivable, Gross	$ 51,722,000	$ 50,040,000
Less: allowance for doubtful accounts	(792,000)	(828,000)
Accounts Receivable, Net	50,930,000	49,212,000
Other receivables	2,877,000	4,036,000
Shipped not Invoiced		$ 1,300,000