CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 47,434	$ 44,948
Accounts receivable, net of allowances of $8,445 and $8,618 at June 30, 2017 and December 31, 2016, respectively	34,433	43,520
Inventories	41,219	50,701
Prepaid expenses	10,058	6,031
Other current assets	4,920	5,805
Total current assets	138,064	151,005
Property and equipment, net	23,977	30,146
Intangible assets, net	18,307	22,932
Goodwill	32,643	32,643
Long-term deferred tax assets, net	1,319	1,245
Other long-term assets	10,427	11,610
Total assets	224,737	249,581
Current liabilities:
Accounts payable	27,495	26,435
Accrued compensation and benefits	29,141	25,387
Accrued expenses and other current liabilities	30,130	34,088
Income taxes payable	1,958	1,012
Short-term debt	5,000	5,000
Deferred revenues	129,858	146,014
Total current liabilities	223,582	237,936
Long-term debt	189,857	188,795
Long-term deferred tax liabilities, net	173	913
Long-term deferred revenues	74,181	79,670
Other long-term liabilities	11,699	12,178
Total liabilities	499,492	519,492
Contingencies (Note 7)
Stockholders' deficit:
Common stock	423	423
Additional paid-in capital	1,038,093	1,043,063
Accumulated deficit	(1,283,894)	(1,271,148)
Treasury stock at cost	(24,270)	(32,353)
Accumulated other comprehensive loss	(5,107)	(9,896)
Total stockholders' deficit	(274,755)	(269,911)
Total liabilities and stockholders' deficit	$ 224,737	$ 249,581