CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 25,056	$ 48,203
Accounts receivable, net of allowances of $10,692 and $13,963 at December 31, 2014 and 2013, respectively	54,655	56,770
Inventories	48,001	60,122
Deferred tax assets, net	322	522
Prepaid expenses	6,892	7,778
Other current assets	17,932	17,493
Total current assets	152,858	190,888
Property and equipment, net	32,136	35,186
Intangible assets, net	2,445	4,260
Long-term deferred tax assets, net	1,886	2,415
Other long-term assets	2,274	2,393
Total assets	191,599	235,142
Current liabilities:
Accounts payable	32,951	33,990
Accrued compensation and benefits	32,636	30,342
Accrued expenses and other current liabilities	32,353	41,273
Income taxes payable	5,480	6,875
Deferred tax liabilities, net	0	14
Deferred revenues	206,608	211,403
Total current liabilities	310,028	323,897
Long-term deferred tax liabilities, net	136	565
Long-term deferred revenues	208,232	255,429
Other long-term liabilities	14,273	14,586
Total liabilities	532,669	594,477
Commitments and contingencies (Note K)
Stockholders' deficit:
Preferred stock, $0.01 par value, 1,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.01 par value, 100,000 shares authorized; 42,339 shares and 42,339 shares issued and 39,294 shares and 39,082 shares outstanding at December 31, 2014 and 2013, respectively	423	423
Additional paid-in capital	1,049,969	1,043,384
Accumulated deficit	(1,321,798)	(1,336,526)
Treasury stock at cost, net of reissuances, 3,045 shares and 3,257 shares at December 31, 2014 and 2013, respectively	(68,051)	(72,543)
Accumulated other comprehensive (loss) income	1,613	(5,927)
Total stockholders' deficit	(341,070)	(359,335)
Total liabilities and stockholders' deficit	$ 191,599	$ 235,142