Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property and equipment:
Gross property and equipment	$ 15,013	$ 14,587
Less accumulated depreciation	(4,717)	(4,018)
Total	10,296	10,569
Manufacturing equipment [Member]
Property and equipment:
Gross property and equipment	6,925	6,925
Leasehold improvements [Member]
Property and equipment:
Gross property and equipment	1,637	1,610
Computer equipment and software [Member]
Property and equipment:
Gross property and equipment	1,510	1,629
Furniture and fixtures [Member]
Property and equipment:
Gross property and equipment	458	458
Construction-in-process [Member]
Property and equipment:
Gross property and equipment	$ 4,483	$ 3,965

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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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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