Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Property and equipment

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

	2012		2013
Machinery and equipment	14,810		16,628
Furniture, fixtures, and computer software	1,159		1,669
Leasehold improvements	1,926		2,578
Construction in progress	909		831
Total property and equipment, at cost	18,804		21,706
Less accumulated depreciation	(11,657	)	(14,141	)
Property and equipment, net	7,147		7,565

Net revenue by major customer

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

	2011		2012		2013
HP	74	%	68	%	59	%
Tektronix	6	%	10	%	13	%
Other customers less than 10%	20	%	22	%	28	%
Total	100	%	100	%	100	%

Allowance for doubtful accounts

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

	December 31, 2012		December 31, 2013
Balance, beginning of the year	$	203	$	240
Write offs	—		(219		)
Additions to allowance	37		2
Balance, end of the year	$	240	$	23