CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 56,104	$ 70,390
Accounts receivable, net of allowances of $16,775 and $20,977 at June 30, 2013 and December 31, 2012, respectively	55,647	67,956
Inventories	63,247	69,143
Deferred tax assets, net	547	586
Prepaid expenses	8,838	9,060
Other current assets	19,025	19,950
Total current assets	203,408	237,085
Property and equipment, net	37,444	41,441
Intangible assets, net	6,528	9,217
Long-term deferred tax assets, net	2,729	2,825
Other long-term assets	2,666	3,793
Total assets	252,775	294,361
Current liabilities:
Accounts payable	28,703	35,425
Accrued compensation and benefits	22,774	25,177
Accrued expenses and other current liabilities	31,658	34,003
Income taxes payable	6,964	7,969
Deferred tax liabilities, net	193	203
Deferred revenues	222,446	230,305
Total current liabilities	312,738	333,082
Long-term deferred tax liabilities, net	687	713
Long-term deferred revenue	291,538	328,180
Other long-term liabilities	15,538	17,978
Total liabilities	620,501	679,953
Contingencies (Note 10)
Stockholders' equity:
Common stock	423	423
Additional paid-in capital	1,040,980	1,039,562
Accumulated deficit	(1,340,238)	(1,357,679)
Treasury stock at cost, net of reissuances	(72,830)	(75,542)
Accumulated other comprehensive income	3,939	7,644
Total stockholders' deficit	(367,726)	(385,592)
Total liabilities and stockholders' deficit	$ 252,775	$ 294,361