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Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

The components of property and equipment consist of the following as of December 31, (in thousands):



	2011		2012
Machinery and equipment	11,577		14,810
Furniture, fixtures, and computer software	854		1,159
Leasehold improvements	1,034		1,926
Construction in progress	855		909
Total property and equipment, at cost	14,320		18,804
Less accumulated depreciation	(9,348	)	(11,657	)
Property and equipment, net	4,972		7,147

Net revenue by major customer

Net revenue by major customer is as follows (as a percentage of total net revenue):



	2010		2011		2012
HP	57	%	74	%	68	%
NetApp, Inc.	26	%	—	%	—	%
Tektronix	—	%	6	%	10	%
Other customers less than 10%	17	%	20	%	22	%
Total	100	%	100	%	100	%

Allowance for doubtful accounts

Balance sheet details are as follows, (in thousands):



	December 31, 2011		December 31, 2012
Balance, beginning of the year	$	—	$	203
Additions to allowance	203		37
Balance, quarter ended	$	203	$	240

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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