CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 25,491	$ 25,056
Accounts receivable, net of allowances of $9,753 and $10,692 at March 31, 2015 and December 31, 2014, respectively	51,764	54,655
Inventories	39,724	48,001
Deferred tax assets, net	316	322
Prepaid expenses	10,635	6,892
Other current assets	15,912	17,932
Total current assets	143,842	152,858
Property and equipment, net	31,241	32,136
Intangible assets, net	2,072	2,445
Long-term deferred tax assets, net	1,718	1,886
Other long-term assets	3,163	2,274
Total assets	182,036	191,599
Current liabilities:
Accounts payable	29,436	32,951
Accrued compensation and benefits	33,008	32,636
Accrued expenses and other current liabilities	32,484	32,353
Income taxes payable	5,381	5,480
Deferred revenues	209,214	206,608
Total current liabilities	309,523	310,028
Long-term deferred tax liabilities, net	136	136
Long-term deferred revenues	203,463	208,232
Other long-term liabilities	13,646	14,273
Total liabilities	526,768	532,669
Contingencies (Note 8)
Stockholders' deficit:
Common stock	423	423
Additional paid-in capital	1,048,567	1,049,969
Accumulated deficit	(1,321,967)	(1,321,798)
Treasury stock at cost	(64,261)	(68,051)
Accumulated other comprehensive income	(7,494)	(1,613)
Total stockholders' deficit	(344,732)	(341,070)
Total liabilities and stockholders' deficit	$ 182,036	$ 191,599