Property and Equipment, Net (Details) (USD $)	6 Months Ended
Jun. 30, 2013	Dec. 31, 2012
Property and Equipment
Property and Equipment, gross	$ 10,444,000	$ 11,042,000
Less - accumulated depreciation	(8,531,000)	(7,745,000)
Property and equipment, net	1,913,000	3,297,000
Depreciation expense	1,300,000
Buildings and improvements
Property and Equipment
Property and Equipment, gross	5,138,000	5,373,000
Accelerated depreciation expense of leasehold improvements and furniture and fixtures associated with a portion of principal executive offices	400,000
Laboratory and production equipment
Property and Equipment
Property and Equipment, gross	343,000	115,000
Furniture and fixtures
Property and Equipment
Property and Equipment, gross	4,963,000	5,326,000
Construction in process
Property and Equipment
Property and Equipment, gross		$ 228,000

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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