Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2011
Summary of depreciable lives by class of assets
Useful life of lease hold improvements Minimum	Life of lease
Useful life of lease hold improvements Maximum	Life of lease
Land improvements [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	5
Maximum useful life of class of asset	25
Buildings [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	10
Maximum useful life of class of asset	40
Machinery and equipment [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	3
Maximum useful life of class of asset	15
Furniture and fixtures [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	4
Maximum useful life of class of asset	15
Automobiles and trucks [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	2
Maximum useful life of class of asset	8
Research equipment [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	6
Maximum useful life of class of asset	12
Computer hardware [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	3
Maximum useful life of class of asset	10
Computer software [Member]
Summary of depreciable lives by class of assets
Minimum useful life of class of asset	3
Maximum useful life of class of asset	10