CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 48,993	$ 51,913
Accounts receivable, net	3,391	3,016
Prepaid expenses and other current assets	299	268
Total current assets	52,683	55,197
Property and equipment, net	4,532	4,634
Investments	996	951
Deferred tax assets	5,802	1,078
Other assets	98	124
Total assets	64,111	61,984
Current liabilities:
Accounts payable	405	135
Accrued expenses	1,080	1,075
Accrued income taxes	36
Deferred revenue	2,240	2,722
Total current liabilities	3,761	3,932
Long-term deferred revenue	181	211
Commitments and contingent liabilities
Stockholders' equity:
Preferred stock, $1.00 par value; 1,000,000 shares authorized, none outstanding
Common stock, $.01 par value; 70,000,000 shares authorized; issued and outstanding 21,837,605 as of March 31, 2017 and 22,370,713 as of December 31, 2016	218	224
Additional paid-in capital	97,628	100,485
Accumulated other comprehensive loss	9	(19)
Accumulated deficit	(37,686)	(42,849)
Total stockholders' equity	60,169	57,841
Total liabilities and stockholders' equity	$ 64,111	$ 61,984

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).

Name:	us-gaap_AccountsPayableCurrent
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.