CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 2,351		$ 670
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,335		1,852
Loss on disposal of fixed assets	10		0
Provision for (recovery of) receivable allowance	(75)		(62)
Share-based compensation expense	2,207		2,392
Income tax benefits from employee stock plans	171		801
Excess tax benefits from employee stock plans	(571)		(921)
Provision for excess and obsolete inventories	159		345
Foreign currency remeasurement loss	(81)		0
Deferred income taxes	(124)		(537)
Changes in operating assets and liabilities:
Accounts receivable, net	(264)		2,968
Inventories	955		(5,959)
Prepaid expenses	591		183
Other current assets	(167)		(512)
Net investment in sales-type leases	(2,329)		210
Other assets	(32)		284
Accounts payable	(390)		628
Accrued compensation	399		(1,349)
Accrued liabilities	(648)		1,250
Deferred service revenue	731		1,607
Deferred gross profit	1,667		(710)
Other long-term liabilities	394		(25)
Net cash provided by operating activities	7,289		3,115
Cash flows from investing activities:
Acquisition of intangible assets and intellectual property	(90)		(24)
Software development for external use	0		(1,823)
Purchases of property and equipment	(1,438)		(2,424)
Net cash used in investing activities	(1,528)		(4,271)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock purchase and stock option plans	3,245		2,998
Stock repurchases	0		(4,729)
Excess tax benefits from employee stock plans	571		921
Net cash (used in) provided by financing activities	3,816		(810)
Effect of exchange rate changes on cash and cash equivalents	81		0
Net increase in cash and cash equivalents	9,658		(1,966)
Cash and cash equivalents at beginning of period	191,762	[1]
Cash and cash equivalents at end of period	201,420
Supplemental disclosure of non-cash operating activity:
Satisfaction of acquired legal contingency with indemnification asset (Note 2)	$ 0		$ (1,200)

[1] (1) Information derived from our December 31, 2011 audited Consolidated Financial Statements.