CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Acquistiion consideration accrued as goodwill and accrued liabilities	$ 0	$ (1,833)
Cash flows from operating activities:
Net income	9,401	3,726
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,244	5,333
Loss on disposal of fixed assets	141	19
Asset Impairment Charges	1,759	0
Provision for (recovery of) receivable allowance	63	335
Share-based compensation expense	5,613	4,420
Income tax benefits from employee stock plans	739	(156)
Excess tax benefits from employee stock plans	(1,258)	(901)
Provision for excess and obsolete inventories	742	254
Foreign currency remeasurement loss	0	(23)
Deferred income taxes	(258)	(535)
Changes in operating assets and liabilities:
Accounts receivable, net	(8,757)	(287)
Inventories	(199)	4,409
Prepaid expenses	(536)	(1,114)
Other current assets	94	799
Net investment in sales-type leases	160	(780)
Other assets	(129)	(27)
Accounts payable	(796)	(817)
Accrued compensation	(374)	5,995
Accrued liabilities	2,065	(3,320)
Deferred service revenue	(1,294)	449
Deferred gross profit	4,578	268
Other long-term liabilities	230	711
Net cash provided by operating activities	21,228	18,758
Cash flows from investing activities:
Purchases of short-term investments	0	0
Maturities of short-term investments	0	8,122
Acquisition of intangible assets and intellectual property	(64)	(249)
Software development for external use	(3,194)	(1,414)
Purchases of property and equipment	(5,711)	(4,087)
Business acquisition, net of cash acquired	0	(156,312)
Net cash used in investing activities	(8,969)	(153,940)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock purchase and stock option plans	11,549	3,627
Stock repurchases	0	(7,060)
Excess tax benefits from employee stock plans	1,258	901
Net cash provided from financing activities	12,807	(2,532)
Effect of exchange rate changes on cash and cash equivalents	(45)	23
Net (decrease) increase in cash and cash equivalents	25,021	(137,691)
Cash and cash equivalents at beginning of period	62,313	191,762
Cash and cash equivalents at end of period	$ 87,334	$ 54,071