Gain on Sale of Dry Strip Assets and Intellectual Property (Details) (USD $)	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013 Dry strip product line, intellectual property rights and certain assets	Jun. 30, 2013 Dry strip product line, intellectual property rights and certain assets	Dec. 31, 2012 Dry strip product line, intellectual property rights and certain assets Maximum
Sale of assets
Contingent purchase price					$ 2,000,000
Gain on sale of dry strip assets and intellectual property	$ 799,000	$ 1,167,000	$ 800,000	$ 1,200,000