Summary Of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Net revenue by major customer

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

	Three Months Ended
	March 31,
	2012		2013
HP	61	%	63	%
Tektronix	19	%	12	%
Other customers less than 10%	20	%	25	%
Total	100	%	100	%

Allowance for doubtful accounts

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

	March 31, 2012		March 31, 2013
Balance, beginning of the year	$	203	$	240
Recoveries	—		(9		)
Balance, quarter ended	$	203	$	231