CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 64,506	$ 70,390
Accounts receivable, net of allowances of $18,648 and $20,977 at March 31, 2013 and December 31, 2012, respectively	56,625	67,956
Inventories	66,643	69,143
Deferred tax assets, net	560	586
Prepaid expenses	10,681	9,060
Other current assets	18,729	19,950
Total current assets	217,744	237,085
Property and equipment, net	38,719	41,441
Intangible assets, net	7,765	9,217
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	2,701	2,825
Other assets	2,943	3,793
Total assets	269,872	294,361
Current liabilities:
Accounts payable	29,968	35,425
Accrued compensation and benefits	22,485	25,177
Accrued expenses and other current liabilities	30,389	34,003
Income taxes payable	6,931	7,969
Deferred tax liabilities, net	200	203
Deferred revenues	231,362	230,305
Total current liabilities	321,335	333,082
Long-term deferred tax liabilities, net	695	713
Long-term deferred revenue	309,569	328,180
Long-term liabilities	16,138	17,978
Other long-term liabilities	16,138	17,978
Total liabilities	647,737	679,953
Contingencies (Note 10)
Stockholders' equity:
Common stock	423	423
Additional paid-in capital	1,040,128	1,039,562
Accumulated deficit	(1,349,414)	(1,357,679)
Treasury stock at cost, net of reissuances	(74,036)	(75,542)
Accumulated other comprehensive income	5,034	7,644
Total stockholders' deficit	(377,865)	(385,592)
Total liabilities and stockholders' deficit	$ 269,872	$ 294,361