Acquisitions - Remag (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Jan. 26, 2011 Remag Ag	Apr. 01, 2010 Cox Flow	Dec. 31, 2012 Licensing Agreements	Dec. 31, 2011 Licensing Agreements
Business Acquisition
Purchase price of acquired entity			$ 4,900,000	$ 7,800,000
Cash			900,000	600,000
Receivables			400,000	700,000
Inventory			400,000	1,100,000
Other assets			300,000
Fixed assets			2,000,000	300,000
Intangibles			1,800,000	4,300,000
Goodwill			200,000	2,200,000
Other liabilities			1,100,000	1,400,000
Purchase price of licensing agreement	$ 69,706,000	$ 40,606,000			$ 650,000	$ 650,000