|
Income Taxes Components of deferred tax asset/ liability (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Components of Deferred Tax Assets and Liabilities [Abstract] | ||
| Net operating loss carry forwards | $ 60,961 | $ 55,669 |
| Tax credit carry forwards | 26,869 | 24,826 |
| Fixed and intangible assets | 7,246 | 7,486 |
| Capitalized research and development costs | 58 | 58 |
| Reserves and other cumulative temporary differences | 19,380 | 20,910 |
| Gross deferred income tax assets | 114,514 | 108,949 |
| Valuation allowance | (114,514) | (108,949) |
| Net deferred income tax assets | $ 0 | $ 0 |
| Percentage of deferred tax assets on which valuation allowance is created | 100.00% | 100.00% |