|
Stockholders' Equity (Employee and non-employee stock options outstanding) (Details) (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
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| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Options outstanding, Number |
10,457,159 |
| Options Exercisable, Number |
5,863,479 |
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Range One [Member]
|
|
| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Exercise price, Lower Limit |
$ 0.01 |
| Exercise price, Upper Limit |
$ 1 |
| Options outstanding, Number |
381,679 |
| Options Exercisable, Number |
381,679 |
| Options Outstanding, Weighted Average Remaining Contractual Term |
3 years 8 months 19 days |
|
Range Two [Member]
|
|
| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Exercise price, Lower Limit |
$ 1.01 |
| Exercise price, Upper Limit |
$ 2 |
| Options outstanding, Number |
1,262,232 |
| Options Exercisable, Number |
1,220,566 |
| Options Outstanding, Weighted Average Remaining Contractual Term |
4 years 2 months 8 days |
|
Range Three [Member]
|
|
| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Exercise price, Lower Limit |
$ 2.01 |
| Exercise price, Upper Limit |
$ 3 |
| Options outstanding, Number |
655,000 |
| Options Exercisable, Number |
161,250 |
| Options Outstanding, Weighted Average Remaining Contractual Term |
8 years 6 months 11 days |
|
Range Four [Member]
|
|
| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Exercise price, Lower Limit |
$ 3.01 |
| Exercise price, Upper Limit |
$ 4 |
| Options outstanding, Number |
7,749,582 |
| Options Exercisable, Number |
3,691,317 |
| Options Outstanding, Weighted Average Remaining Contractual Term |
8 years 8 months 1 day |
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Range Five [Member]
|
|
| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Exercise price, Lower Limit |
$ 4.01 |
| Exercise price, Upper Limit |
$ 5 |
| Options outstanding, Number |
11,166 |
| Options Exercisable, Number |
11,167 |
| Options Outstanding, Weighted Average Remaining Contractual Term |
2 months 19 days |
|
Range Six [Member]
|
|
| Based Arrangements With Employees And Nonemployees [Line Items] |
|
| Exercise price, Lower Limit |
$ 5.04 |
| Exercise price, Upper Limit |
$ 6 |
| Options outstanding, Number |
397,500 |
| Options Exercisable, Number |
397,500 |
| Options Outstanding, Weighted Average Remaining Contractual Term |
2 years 6 months 22 days |