CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 50,233	$ 70,390
Accounts receivable, net of allowances of $15,293 and $20,977 at September 30, 2013 and December 31, 2012, respectively	55,560	67,956
Inventories	61,670	69,143
Deferred tax assets, net	562	586
Prepaid expenses	8,074	9,060
Other current assets	21,354	19,950
Total current assets	197,453	237,085
Property and equipment, net	36,940	41,441
Intangible assets, net	5,674	9,217
Long-term deferred tax assets, net	2,857	2,825
Other long-term assets	2,488	3,793
Total assets	245,412	294,361
Current liabilities:
Accounts payable	30,583	35,425
Accrued compensation and benefits	23,604	25,177
Accrued expenses and other current liabilities	36,916	34,003
Income taxes payable	7,328	7,969
Deferred tax liabilities, net	196	203
Deferred revenues	219,178	230,305
Total current liabilities	317,805	333,082
Long-term deferred tax liabilities, net	708	713
Long-term deferred revenue	273,143	328,180
Long-term liabilities	14,985	17,978
Other long-term liabilities	14,985	17,978
Total liabilities	606,641	679,953
Contingencies (Note 10)
Stockholders' equity:
Common stock	423	423
Additional paid-in capital	1,042,249	1,039,562
Accumulated deficit	(1,337,655)	(1,357,679)
Treasury stock at cost, net of reissuances	(72,599)	(75,542)
Accumulated other comprehensive income	6,353	7,644
Total stockholders' deficit	(361,229)	(385,592)
Total liabilities and stockholders' deficit	$ 245,412	$ 294,361