CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 47,014	$ 44,948
Accounts receivable, net of allowances of $8,427 and $8,618 at March 31, 2017 and December 31, 2016, respectively	43,626	43,520
Inventories	49,128	50,701
Prepaid expenses	12,008	6,031
Other current assets	5,733	5,805
Total current assets	157,509	151,005
Property and equipment, net	28,414	30,146
Intangible assets, net	20,620	22,932
Goodwill	32,643	32,643
Long-term deferred tax assets, net	1,265	1,245
Other long-term assets	9,913	11,610
Total assets	250,364	249,581
Current liabilities:
Accounts payable	28,844	26,435
Accrued compensation and benefits	27,843	25,387
Accrued expenses and other current liabilities	31,929	34,088
Income taxes payable	1,162	1,012
Short-term debt	5,000	5,000
Deferred revenues	144,425	146,014
Total current liabilities	239,203	237,936
Long-term debt	189,302	188,795
Long-term deferred tax liabilities, net	543	913
Long-term deferred revenues	78,608	79,670
Other long-term liabilities	11,644	12,178
Total liabilities	519,300	519,492
Contingencies (Note 8)
Stockholders' deficit:
Common stock	423	423
Additional paid-in capital	1,041,005	1,043,063
Accumulated deficit	(1,273,063)	(1,271,148)
Treasury stock at cost	(29,255)	(32,353)
Accumulated other comprehensive loss	(8,046)	(9,896)
Total stockholders' deficit	(268,936)	(269,911)
Total liabilities and stockholders' deficit	$ 250,364	$ 249,581