Accrued Liabilities Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Accrued Liabilities [Line Items]
Employee-related Liabilities, Current	$ 607	$ 1,039
Accrued Professional Fees, Current	401	552
Product Warranty Accrual, Current	583	936
Other Accrued Liabilities, Current	630	924
Accrued Liabilities, Current	$ 2,221	$ 3,451