CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and equivalents	$ 101,432	$ 78,661
Short term investments		79,733
Accounts receivable, net of allowances of $696 in 2018 and $520 in 2017	41,704	48,126
Inventories, net	14,454	12,040
Prepaid expenses	6,329	3,876
Contract assets	4,915
Other current assets	7,978	5,501
Total current assets	176,812	227,937
Property and equipment:
Furniture and fixtures	7,730	5,655
Office equipment	10,384	13,084
Total Property and equipment:	18,114	18,739
Accumulated depreciation	(11,533)	(13,963)
Property and equipment, net	6,581	4,776
Goodwill	95,456	56,332
Intangible assets, net of accumulated amortization	49,138	37,888
Deferred income taxes	4,922	5,460
Contract assets - non-current	7,534
Other assets	6,649	5,229
Total assets	347,092	337,622
Current liabilities
Accounts payable	6,520	8,144
Deferred revenue	30,675	33,295
Accrued wages and payroll taxes	10,837	11,643
Short-term income taxes payable	1,599	3,673
Other accrued expenses	10,680	7,746
Deferred compensation	583	1,652
Total current liabilities	60,894	66,153
Long-term deferred revenue	6,947	7,019
Other long-term liabilities	7,556	5,919
Long-term income taxes payable	11,648	12,848
Deferred income taxes	9,131	7,753
Total liabilities	96,176	99,692
Stockholders' equity
Common stock: $.001 par value per share, 75,000 shares authorized; 40,233 and 40,086 issued and outstanding at June 30, 2018 and December 31, 2017, respectively	40	40
Additional paid-in capital	92,115	90,307
Accumulated income	169,317	156,151
Accumulated other comprehensive loss	(10,556)	(8,568)
Total stockholders' equity	250,916	237,930
Total liabilities and stockholders' equity	$ 347,092	$ 337,622

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.