Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2012

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,
	2011		2012		2011		2012
HP	73	%	68	%	76	%	67	%
Tektronix	7	%	4	%	5	%	10	%
Other customers less than 10%	20	%	28	%	19	%	23	%
Total	100	%	100	%	100	%	100	%

Allowance for doubtful accounts

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

	September 30, 2011		September 30, 2012
Balance, beginning of the year	$	—	$	203
Additions to allowance	203		12
Balance, quarter ended	$	203	$	215