CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 49,142	$ 69,085
Restricted cash	1,664	1,663
Accounts receivable, net of allowances	59,683	73,773
Inventories	28,378	29,166
Prepaid expenses	10,526	9,425
Contract assets	15,276	19,494
Other current assets	2,608	6,125
Total current assets	167,277	208,731
Property and equipment, net	18,884	19,580
Goodwill	32,643	32,643
Right of use assets	30,408	29,747
Long-term deferred tax assets, net	6,539	7,479
Other long-term assets	5,651	6,113
Total assets	261,402	304,293
Current liabilities:
Accounts payable	13,450	39,888
Accrued compensation and benefits	30,452	19,524
Accrued expenses and other current liabilities	34,758	36,759
Income taxes payable	1,946	1,945
Short-term debt	4,135	30,554
Deferred revenues	70,858	83,589
Total current liabilities	155,599	212,259
Long-term debt	204,074	199,034
Long-term deferred revenues	10,306	14,312
Long-term lease liabilities	29,473	28,127
Other long-term liabilities	6,162	5,646
Total liabilities	405,614	459,378
Commitments and Contingencies (Note 8)
Stockholders' deficit:
Common stock	439	430
Additional paid-in capital	1,033,599	1,027,824
Accumulated deficit	(1,175,434)	(1,179,409)
Accumulated other comprehensive loss	(2,816)	(3,930)
Total stockholders' deficit	(144,212)	(155,085)
Total liabilities and stockholders' deficit	$ 261,402	$ 304,293