Note 9 - Other Financial Information

Prepaid Expenses

Prepaid expenses consist of the following at December 31 (in thousands):


	2013		2012
Laboratory supplies	$	1,754	$	1,592
Other prepaid expenses		1,290		967
Prepaid expenses	$	3,044	$	2,559

Property and Equipment, net

Property and equipment is comprised of the following at December 31 (in thousands):


	2013			2012
Machinery and equipment	$	11,951		$	8,035
Leasehold improvements		8,192			4,629
Computer software and hardware		1,200			698
Construction in progress		2,328			5,248
		23,671			18,610
Less - accumulated depreciation and amortization		(9,420	)		(7,154	)
Property and equipment, net	$	14,251		$	11,456

Depreciation and amortization expense was approximately $2.6 million, $1.7 million and $1.6 million for the years ended December 31, 2013, 2012 and 2011, respectively. Machinery and equipment included $0.6 million of equipment acquired under capital leases (see Note 10) with accumulated depreciation of $0.2 million as of December 31, 2013.

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consist of the following at December 31 (in thousands):


	2013		2012
Employee benefits and compensation	$	5,323	$	3,242
Research and development accruals		4,469		3,396
Other accrued expenses		1,356		592
Accrued interest		75		45
Accrued expenses and other current liabilities	$	11,223	$	7,275