CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 3,385	$ 2,351
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,472	2,335
Loss on disposal of fixed assets	41	10
Asset Impairment Charges	1,759	0
Provision for (recovery of) receivable allowance	129	(75)
Share-based compensation expense	2,926	2,207
Income tax benefits from employee stock plans	342	171
Excess tax benefits from employee stock plans	(555)	(571)
Provision for excess and obsolete inventories	451	159
Foreign currency remeasurement loss	0	(81)
Deferred income taxes	(1,076)	(124)
Changes in operating assets and liabilities:
Accounts receivable, net	(10,706)	(264)
Inventories	327	955
Prepaid expenses	(657)	591
Other current assets	1,061	(167)
Net investment in sales-type leases	443	(2,329)
Other assets	(463)	(32)
Accounts payable	124	(390)
Accrued compensation	(4,665)	399
Accrued liabilities	537	(648)
Deferred service revenue	(42)	731
Deferred gross profit	6,166	1,667
Other long-term liabilities	133	394
Net cash provided by operating activities	4,132	7,289
Cash flows from investing activities:
Purchases of short-term investments	0	0
Maturities of short-term investments	0		0
Acquisition of intangible assets and intellectual property	(48)	(90)
Software development for external use	(1,899)	0
Purchases of property and equipment	(3,300)	(1,438)
Business acquisition, net of cash acquired	0	0
Net cash used in investing activities	(5,247)	(1,528)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock purchase and stock option plans	8,104	3,245
Stock repurchases	0	0
Excess tax benefits from employee stock plans	555	571
Net cash provided from financing activities	8,659	3,816
Effect of exchange rate changes on cash and cash equivalents	(40)	81
Net (decrease) increase in cash and cash equivalents	7,504	9,658
Cash and cash equivalents at beginning of period	62,313	191,762	191,762
Cash and cash equivalents at end of period	$ 69,817	$ 201,420	$ 62,313