Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 14,781	$ 10,699
Investment securities—current	28,396	15,473
Accounts receivable, net	3,419	2,511
Prepaid expenses and other current assets	4,393	3,537
Total current assets	50,989	32,220
Investment securities—noncurrent	20,423	26,688
Property and equipment, net	7,005	7,077
Capitalized software, net	17,320	15,539
Goodwill	6,737	6,737
Intangible assets, net	2,054	3,105
Other assets	1,219	1,217
Total assets	105,747	92,583
Current liabilities
Accounts payable	1,164	937
Accrued employee expenses	8,169	7,550
Accrued expenses	5,908	4,044
Deferred revenue	7,508	7,638
Other current liabilities	1,083	1,192
Total current liabilities	23,832	21,361
Other liabilities	1,238	1,540
Total liabilities	25,070	22,901
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 25,000 authorized and no shares issued and outstanding as of September 30, 2017 and December 31, 2016	0	0
Additional paid-in capital	150,520	146,692
Accumulated other comprehensive loss	(23)	(51)
Accumulated deficit	(69,824)	(76,963)
Total stockholders’ equity	80,677	69,682
Total liabilities and stockholders’ equity	105,747	92,583
Class A common stock
Stockholders’ equity:
Common stock	1	1
Class B common stock
Stockholders’ equity:
Common stock	$ 3	$ 3

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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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.