CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 44,332	$ 56,818
Restricted cash	2,413	2,416
Accounts receivable, net of allowances	53,878	77,046
Inventories	19,249	19,922
Prepaid expenses	9,003	5,464
Contract assets	20,950	18,903
Other current assets	2,199	1,953
Total current assets	152,024	182,522
Property and equipment, net	19,689	16,028
Goodwill	32,643	32,643
Right of use assets	21,874	24,143
Deferred tax assets, net	3,600	5,210
Other long-term assets	17,292	13,454
Total assets	247,122	274,000
Current liabilities:
Accounts payable	32,899	26,854
Accrued compensation and benefits	21,568	35,458
Accrued expenses and other current liabilities	34,902	37,552
Income taxes payable	92	868
Less: current portion	8,701	9,158
Deferred revenues	68,724	87,475
Total current liabilities	166,886	197,365
Long-term debt	177,782	160,806
Long-term deferred revenues	12,209	10,607
Long-term lease liabilities	21,298	23,379
Other long-term liabilities	5,307	5,917
Total liabilities	383,482	398,074
Commitments and contingencies (Note 7)
Stockholders' deficit:
Common stock, par value $0.01; authorized: 100,000 shares; issued: 46,408 shares at June 30, 2022 and 45,828 shares at December 31, 2021; outstanding: 44,620 shares at June 30, 2022 and 44,954 shares at December 31, 2021	461	455
Treasury stock	(50,049)	(25,090)
Additional paid-in capital	1,028,277	1,031,633
Accumulated deficit	(1,109,000)	(1,126,959)
Accumulated other comprehensive loss	(6,049)	(4,113)
Total stockholders' deficit	(136,360)	(124,074)
Total liabilities and stockholders' deficit	$ 247,122	$ 274,000