Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012
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
Minimum [Member] | Land improvements [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	5 years
Minimum [Member] | Buildings [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	10 years
Minimum [Member] | Machinery and equipment [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	3 years
Minimum [Member] | Furniture and fixtures [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	4 years
Minimum [Member] | Automobiles and trucks [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	2 years
Minimum [Member] | Research equipment [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	6 years
Minimum [Member] | Computer hardware [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	3 years
Minimum [Member] | Computer software [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	3 years
Maximum [Member] | Land improvements [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	25 years
Maximum [Member] | Buildings [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	40 years
Maximum [Member] | Machinery and equipment [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	15 years
Maximum [Member] | Furniture and fixtures [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	15 years
Maximum [Member] | Automobiles and trucks [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	8 years
Maximum [Member] | Research equipment [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	12 years
Maximum [Member] | Computer hardware [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	10 years
Maximum [Member] | Computer software [Member]
Summary of depreciable lives by class of assets
Useful life of class of asset	10 years