Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 22,121	$ 23,735
Available-for-sale securities	101,605	89,917
Accounts receivable	3	794
Inventory	425	0
Prepaid expenses and other current assets	2,806	2,541
Total current assets	126,960	116,987
Property and equipment, net	3,110	3,156
Available-for-sale securities, non-current	7,004	22,292
Other assets	38	38
Total assets	137,112	142,473
Current liabilities
Accounts payable	5,380	3,589
Accrued liabilities	9,539	5,867
Other current liabilities	292	287
Total current liabilities	15,211	9,743
Long-term debt	35,408	0
Other non-current liabilities	615	547
Total liabilities	51,234	10,290
Commitments and Contingencies (Note 7)
Stockholders’ equity
Preferred stock, $0.001 par value — 5,000,000 shares authorized, and zero shares issued and outstanding at September 30, 2017 and December 31, 2016	0	0
Common stock, $0.001 par value — 100,000,000 shares authorized, 22,716,277 and 22,013,644 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	27	27
Additional paid-in capital	268,305	254,558
Accumulated other comprehensive loss	(112)	(193)
Accumulated deficit	(182,342)	(122,209)
Total stockholders’ equity	85,878	132,183
Total liabilities and stockholders’ equity	$ 137,112	$ 142,473

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.