CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 50,955	$ 56,103
Restricted cash	9,020	8,500
Accounts receivable, net of allowances	58,634	67,754
Inventories	34,105	32,956
Prepaid expenses	10,080	8,853
Contract assets	18,478	16,513
Other current assets	5,466	5,917
Total current assets	186,738	196,596
Property and equipment, net	20,132	21,582
Intangible assets, net	0	4,432
Goodwill	32,643	32,643
Right of use assets	33,324	0
Long-term deferred tax assets, net	1,122	1,158
Other long-term assets	8,142	9,432
Total assets	282,101	265,843
Current liabilities:
Accounts payable	39,083	39,239
Accrued compensation and benefits	17,054	21,967
Accrued expenses and other current liabilities	40,899	37,547
Income taxes payable	1,791	1,853
Short-term debt	28,871	1,405
Deferred revenues	79,214	85,662
Total current liabilities	206,912	187,673
Long-term debt	200,227	220,590
Long-term deferred revenues	14,302	13,939
Long-term lease liabilities	31,216	0
Other long-term liabilities	5,267	10,302
Total liabilities	457,924	432,504
Contingencies (Note 7)
Stockholders' deficit:
Common stock	427	423
Additional paid-in capital	1,025,301	1,028,924
Accumulated deficit	(1,197,946)	(1,187,010)
Treasury stock at cost	0	(5,231)
Accumulated other comprehensive loss	(3,605)	(3,767)
Total stockholders' deficit	(175,823)	(166,661)
Total liabilities and stockholders' deficit	$ 282,101	$ 265,843