Property and Equipment (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Property and Equipment [Line Items]
Plant and Equipment, Gross	$ 24,581,000	$ 15,022,000
Less accumulated depreciation and amortization	(11,425,000)	(9,415,000)
Net plant and equipment	13,156,000	5,607,000
Land	1,600,000	0
Net property, plant and equipment	14,756,000	5,607,000
Manufacturing Equipment [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	10,174,000	8,213,000
Building [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	6,407,000	0
Leasehold Improvements [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	2,269,000	2,101,000
Office and Computer Equipment [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	2,265,000	2,082,000
Research and Development Equipment [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	1,707,000	1,470,000
Construction in Progress [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	977,000	442,000
Furniture and Fixtures [Member]
Property and Equipment [Line Items]
Plant and Equipment, Gross	$ 782,000	$ 714,000