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Income Taxes - Valuation Allowance (Details) (USD $)	12 Months Ended
Income Taxes - Valuation Allowance (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Valuation Allowance [Line Items]
Deferred tax assets, valuation allowance	$ 4,832,000	$ 4,059,000
State \| Research & Experimentation
Valuation Allowance [Line Items]
Deferred tax assets, valuation allowance	4,700,000
People's Republic of China
Valuation Allowance [Line Items]
Period of recognition for deductible expenses or deferred tax assets	5 years
Deferred other tax expense	$ 200,000	$ 600,000

Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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