CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 50,365	$ 17,902
Accounts receivable, net of allowances of $7,807 and $9,226 at June 30, 2016 and December 31, 2015, respectively	44,769	58,807
Inventories	53,902	48,073
Prepaid expenses	9,220	6,548
Other current assets	7,179	6,119
Total current assets	165,435	137,449
Property and equipment, net	35,676	35,481
Intangible assets, net	27,762	33,219
Goodwill	32,643	32,643
Long-term deferred tax assets, net	2,025	2,011
Other long-term assets	10,169	7,123
Total assets	273,710	247,926
Current liabilities:
Accounts payable	35,121	45,511
Accrued compensation and benefits	22,814	28,124
Accrued expenses and other current liabilities	24,871	35,354
Income taxes payable	495	1,023
Short-term debt	5,000	5,000
Deferred revenues	165,623	189,887
Total current liabilities	253,924	304,899
Long-term debt	187,830	95,950
Long-term deferred tax liabilities, net	2,088	3,443
Long-term deferred revenues	101,529	158,495
Other long-term liabilities	17,343	14,711
Total liabilities	562,714	577,498
Contingencies (Note 8)
Stockholders' deficit:
Common stock	423	423
Additional paid-in capital	1,054,641	1,055,838
Accumulated deficit	(1,285,489)	(1,319,318)
Treasury stock at cost	(52,858)	(58,336)
Accumulated other comprehensive loss	(5,721)	(8,179)
Total stockholders' deficit	(289,004)	(329,572)
Total liabilities and stockholders' deficit	$ 273,710	$ 247,926