CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 23,979	$ 16,178	$ 10,389
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,365	13,325	7,983
Loss on disposal of fixed assets	345	66	0
Gain on legal settlement	1,759	0	0
Provision for (recovery of) receivable allowance	110	582	(155)
Gain on sale of note receivable	0	0	(473)
Share-based compensation expense	11,151	9,214	9,499
Income tax benefits from employee stock plans	2,576	2,527	3,597
Excess tax benefits from employee stock plans	(3,673)	(3,182)	(3,946)
Provision for excess and obsolete inventories	856	394	1,112
Foreign currency remeasurement loss	0	0	210
Deferred Income Taxes and Tax Credits	787	2,718	589
Changes in operating assets and liabilities:
Accounts receivable, net	(3,609)	(9,311)	5,863
Inventories	(5,410)	2,536	(9,434)
Prepaid Expenses	(3,491)	(4,897)	1,464
Other current assets	1,566	(1,114)	(594)
Net investment in sales-type leases	1,723	(4,154)	1,036
Other assets	630	(3,831)	339
Accounts payable	(1,784)	1,751	(2,242)
Accrued compensation	7,991	4,285	(403)
Increase (Decrease) in Accrued Liabilities	1,758	674	(342)
Deferred Gross Profit	(815)	6,562	2,491
Deferred service revenue	82	2,914	3,596
Increase in Other Noncurrent Liabilities	367	2,247	664
Net Cash Provided by Operating Activities, Continuing Operations	55,263	39,484	31,243
Cash flows from investing activities:
Purchases of short-term investments	0	0	(8,097)
Maturities of short-term investments	0	8,122	8,143
Acquisition of intangible assets and intellectual property	(356)	(373)	(235)
Software development for external use	(7,761)	(5,028)	(4,192)
Purchases of property and equipment	(12,335)	(15,120)	(8,685)
Business acquisition, net of cash acquired	0	(156,312)	0
Net cash used in investing activities	(20,452)	(168,711)	(13,066)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock purchase and stock option plans	24,663	8,949	6,787
Stock repurchases	(20,962)	(12,363)	(12,573)
Excess tax benefits from employee stock plans	3,673	3,182	3,946
Net cash provided from (used in) financing activities	7,374	(232)	(1,840)
Effect of exchange rate changes on cash and cash equivalents	33	10	(210)
Net (decrease) increase in cash and cash equivalents	42,218	(129,449)	16,127
Cash and cash equivalents at beginning of period	62,313	191,762	175,635
Cash and cash equivalents at end of period	104,531	62,313	191,762
Supplemental disclosure of cash flow information:
Cash paid for interest	122	28	62
Cash paid for taxes	7,062	6,676	253
Purchases of property and equipment recorded in accounts payable and/or accrued liabilities	196	0	0
Satisfaction of acquired legal contingency with indemnification asset	$ 0	$ 0	$ (1,200)