Income Taxes Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Provision for U.S. federal or state income taxes	$ 0
provision for income taxes related to foreign operations	700,000
Federal statutory income tax rate	34.00%	34.00%	34.00%
Unrecognized Tax Benefits	160,000	0
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	110,000
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	50,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	13,000
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Operating loss carryforwards	54,000,000
California
Income Taxes [Line Items]
Operating loss carryforwards	$ 49,000,000