Balance Sheet Components

3 Months Ended

Mar. 31, 2012

Property, Plant and Equipment [Abstract]

Balance Sheet Components

Balance Sheet Components

Inventories

	March 31,		December 31,
(in thousands)	2012		2011
Raw Materials	$	161	$	250
Finished Goods	2,934		3,113
Total Inventories	$	3,095	$	3,363

Property and Equipment

	March 31,			December 31,
(in thousands)	2012			2011
Computer equipment and software	$	3,884		$	3,712
Furniture fixtures and equipment	966			1,018
Leasehold Improvements	1,662			1,493
Manufacturing tools and equipment	3,127			3,027
Construction in process	165			90
Less: Accumulated depreciation	(7,012		)	(6,639		)
Property and equipment, net	$	2,792		$	2,701

Depreciation and amortization expense was $0.3 million and $0.2 million for the three months ended March 31, 2012 and March 31, 2011, respectively.

Accrued Liabilities

	March 31,		December 31,
(in thousands)	2012		2011
Payroll and related expenses	$	3,657	$	4,424
Uninvoiced purchases	3,810		1,741
Preferred stock warrant liability	3,216		1,853
Deferred rent	530		500
Exercise of unvested stock options	449		373
Customer prepayments	940		387
Other	716		865
Total accrued payroll and other accruals	$	13,318	$	10,143