CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 13,131	$ 9,851
Marketable securities	72,115	75,017
Prepaid expenses and other current assets	1,587	1,656
Total current assets	86,833	86,524
Marketable securities		7,170
Property and equipment, net	417	360
Other assets	20	22
Total assets	87,270	94,076
Current liabilities:
Accounts payable	2,808	810
Accrued expenses	921	745
Total current liabilities	3,729	1,555
Other liabilities	330
Total liabilities	$ 4,059	$ 1,555
Stockholders' Equity:
Common stock, $0.00001 par value; 100,000,000 shares authorized at March 31, 2016 and December 31, 2015; 20,316,923 and 20,157,503 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively
Additional paid-in capital	$ 139,080	$ 135,503
Accumulated other comprehensive income (loss)	3	(149)
Accumulated deficit	(55,872)	(42,833)
Total stockholders’ equity	83,211	92,521
Total liabilities and stockholders’ equity	$ 87,270	$ 94,076

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

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).