Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 41,195	$ 59,219
Accounts receivable	11,635	8,756
Supplies inventory	3,760	3,475
Prepaid expenses and other current assets	1,617	2,057
Restricted cash	0	120
Total current assets	58,207	73,627
Property and equipment, net	10,281	11,480
Finite-lived intangible assets, net	13,333	14,133
Goodwill	1,057	1,057
Restricted cash	603	603
Other assets	178	134
Total assets	83,659	101,034
Current liabilities:
Accounts payable	3,161	2,424
Accrued liabilities	8,058	9,110
Total current liabilities	11,219	11,534
Long-term debt	24,997	24,918
Capital lease liability, net of current portion	382	599
Deferred rent, net of current portion	4,245	4,402
Total liabilities	40,843	41,453
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized, no shares issued and outstanding as of September 30, 2017 and December 31, 2016	0	0
Common stock, $0.001 par value; 125,000,000 shares authorized, 33,977,840 and 33,762,278 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	34	34
Additional paid-in capital	245,430	239,631
Accumulated deficit	(202,648)	(180,084)
Total stockholders’ equity	42,816	59,581
Total liabilities and stockholders’ equity	$ 83,659	$ 101,034

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.