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Balance Sheet Components - Accrued Liabilities and Other (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Balance Sheet Components [Abstract]
Accured employee compensation and benefits	$ 1,258	$ 2,175
Other accrued liabilities	1,558	2,184
Accrued liabilities and other	$ 2,816	$ 4,359

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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