CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 8,896	$ 8,265
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	4,914	6,135
Recovery from doubtful accounts	(108)	(36)
Gain on sales of assets	0	(125)
Stock-based compensation expense	1,262	2,077
Non-cash interest expense	73	73
Foreign currency transaction losses	48	44
(Benefit from) provision for deferred taxes	(15)	3
Changes in operating assets and liabilities:
Accounts receivable	(1,541)	11,366
Inventories	1,877	2,501
Prepaid expenses and other current assets	(2,015)	(374)
Accounts payable	4,148	5,383
Accrued expenses, compensation and benefits and other liabilities	17,543	7,532
Income taxes payable	671	878
Deferred revenues	15,021	17,546
Net cash used in operating activities	(24,000)	(1,410)
Cash flows from investing activities:
Purchases of property and equipment	(3,515)	(2,126)
Proceeds from divestiture of consumer business	1,500	0
Proceeds from sale of assets	0	125
Increase in other long-term assets	(20)	(8)
Net cash used in investing activities	(2,035)	(2,009)
Cash flows from financing activities:
Proceeds from the issuance of common stock under employee stock plans	0	176
Common stock repurchases for tax withholdings for net settlement of equity awards	(108)	(181)
Net cash used in financing activities	(108)	(5)
Effect of exchange rate changes on cash and cash equivalents	176	(2,460)
Net decrease in cash and cash equivalents	(25,959)	(5,884)
Cash and cash equivalents at beginning of period	48,203	70,390
Cash and cash equivalents at end of period	22,244	64,506
Cash paid for income taxes, net of refunds	524	476
Cash paid for interest	$ 300	$ 262