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Other Financial Information | 12 Months Ended
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Dec. 31, 2011
Other Financial Information | ## Note 6 — Other Financial Information ### Prepaid Expenses Prepaid expenses consist of the following at December 31 (in thousands):
|  | 2011 |  | 2010
Laboratory supplies |  | $ | 1,616 |  |  | $ | 784 |
Other prepaid expenses |  |  | 825 |  |  |  | 558 |
Prepaid expenses |  | $ | 2,441 |  |  | $ | 1,342 |
### Property and Equipment, net Property and equipment is comprised of the following at December 31 (in thousands):
|  | 2011 |  | 2010
Construction in progress |  | $ | 56 |  |  | $ | 522 |
Machinery and equipment |  |  | 7,131 |  |  |  | 6,697 |
Leasehold improvements |  |  | 4,548 |  |  |  | 4,531 |
Computer software and hardware |  |  | 669 |  |  |  | 554 |
|  |  | 12,404 |  |  |  | 12,304 |
Less accumulated depreciation and amortization |  |  | (5,547 | ) |  |  | (4,098 | )
Property and equipment, net |  | $ | 6,857 |  |  | $ | 8,206 |
Depreciation and amortization expense was approximately $1.6 million, $1.4 million and $1.2 million for the years ended December 31, 2011, 2010 and 2009, respectively. ### Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following at December 31 (in thousands):
|  | 2011 |  | 2010
Employee benefits and compensation |  | $ | 2,283 |  |  | $ | 2,293 |
Research and development accruals |  |  | 1,213 |  |  |  | 3,421 |
Other accrued expenses |  |  | 1,000 |  |  |  | 535 |
Accrued interest |  |  | 32 |  |  |  | 24 |
Accrued expenses and other current liabilities |  | $ | 4,528 |  |  | $ | 6,273

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- Definition The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement. + References No definition available. + Details
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