CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 50,460	$ 57,223
Restricted Cash, Current	8,500	0
Accounts receivable, net of allowances of $1,268 and $11,142 at September 30, 2018 and December 31, 2017, respectively	50,998	40,134
Inventories	32,111	38,421
Prepaid expenses	9,453	8,208
Contract with Customer, Asset, Gross	17,147	0
Other current assets	6,890	10,341
Total current assets	175,559	154,327
Property and equipment, net	19,350	21,903
Intangible assets, net	6,745	13,682
Goodwill	32,643	32,643
Long-term deferred tax assets, net	1,282	1,318
Other long-term assets	11,466	10,811
Total assets	247,045	234,684
Current liabilities:
Accounts payable	33,593	30,160
Accrued compensation and benefits	21,666	25,466
Accrued expenses and other current liabilities	37,865	31,549
Income taxes payable	2,182	1,815
Short-term debt	1,401	5,906
Deferred revenues	73,935	121,184
Total current liabilities	170,642	216,080
Long-term debt	229,429	204,498
Long-term deferred revenues	14,289	73,429
Other long-term liabilities	6,820	9,247
Total liabilities	421,180	503,254
Contingencies (Note 7)
Stockholders' deficit:
Common stock	423	423
Additional paid-in capital	1,028,468	1,035,808
Accumulated deficit	(1,192,913)	(1,284,703)
Treasury stock at cost	(6,717)	(17,672)
Accumulated other comprehensive loss	(3,396)	(2,426)
Total stockholders' deficit	(174,135)	(268,570)
Total liabilities and stockholders' deficit	$ 247,045	$ 234,684