CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 48,203	$ 70,390
Accounts receivable, net of allowances of $13,963 and $20,977 at December 31, 2013 and 2012, respectively	56,770	67,956
Inventories	60,122	69,143
Deferred tax assets, net	522	586
Prepaid expenses	7,778	9,060
Other current assets	17,493	19,950
Total current assets	190,888	237,085
Property and equipment, net	35,186	41,441
Intangible assets, net	4,260	9,217
Long-term deferred tax assets, net (in other assets)	2,415	2,825
Other long-term assets	2,393	3,793
Total assets	235,142	294,361
Current liabilities:
Accounts payable	33,990	35,425
Accrued compensation and benefits	30,342	25,177
Accrued expenses and other current liabilities	41,273	34,003
Income taxes payable	6,875	7,969
Deferred Tax Liabilities, Net, Current	14	203
Deferred revenues	211,403	230,305
Total current liabilities	323,897	333,082
Long-term deferred tax liabilities, net	565	713
Long-term deferred revenues	255,429	328,180
Other long-term liabilities	14,586	17,978
Total liabilities	594,477	679,953
Commitments and contingencies (Notes L and O)
Stockholders' equity:
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 39,082 and 38,936 outstanding at December 31, 2013 and 2012, respectively	423	423
Additional paid-in capital	1,043,384	1,039,562
Accumulated deficit	(1,336,526)	(1,357,679)
Treasury stock at cost, net of reissuances, 3,257 shares and 3,403 shares at December 31, 2013 and 2012, respectively	(72,543)	(75,542)
Accumulated other comprehensive income	(5,927)	(7,644)
Total stockholders' equity	(359,335)	(385,592)
Total liabilities and stockholders' equity	$ 235,142	$ 294,361