Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 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				Nine Months Ended
	September 30,				September 30,
	2012		2013		2012		2013
HP	68	%	58	%	67	%	56	%
Tektronix	4	%	13	%	10	%	15	%
Other customers less than 10%	28	%	29	%	23	%	29	%
Total	100	%	100	%	100	%	100	%

Allowance for doubtful accounts

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

	September 30, 2012		September 30, 2013
Balance, beginning of the year	$	203	$	240
Additions to allowance	12		4
Write-offs	—		(212		)
Recoveries	—		(1		)
Balance, quarter ended	$	215	$	31