| **Accounts Payable and Accrued Expenses (Tables)**   | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
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| **Accounts Payable and Accrued Expenses [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Schedule of accounts payable and accrued expenses    |   June 30, 2014  December 31, 2013 Accrued consulting and clinical trial costs $1,939  $2,672 Accrued payroll and related costs  1,329   2,123 Restructuring accrual  49   - Legal and professional fees  545   608 Accounts payable  186   793 Other  189   316 Total $4,237  $6,512  |

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| - Definition
Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses.
+ References
No definition available.
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