Selling Arrangement (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended
	Feb. 09, 2011	Dec. 31, 2012	Dec. 31, 2011
Selling Arrangement [Abstract]
Settlement agreement, amount paid	$ 4,000,000		$ (4,000,000)
Settlement agreement, term		10 years
Settlement agreement, amortization expense		400,000	283,000
Settlement agreement, expected yearly amortization expense, year one		400,000
Settlement agreement, expected yearly amortization expense, year two		400,000
Settlement agreement, expected yearly amortization expense, year three		400,000
Settlement agreement, expected yearly amortization expense, year four		400,000
Settlement agreement, expected yearly amortization expense, year five		$ 400,000
Settlement agreement, expected yearly amortization expense, term		5 years