CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 10,008	$ 5,640
Short-term investments	2,750	14,598
Accounts receivable, net	626	729
Inventories	1,424	1,597
Prepaid expenses and other	564	701
Total current assets	15,372	23,265
Property and equipment, net	1,492	1,630
Goodwill	23,134	23,134
Other assets	374	663
Total assets	40,372	48,692
Current liabilities
Accounts payable	261	940
Accrued expenses and other	2,190	2,664
Total current liabilities	2,451	3,604
Convertible notes payable	8,238
Other long-term liabilities	240	247
Total liabilities	10,929	3,851
Commitments and contingencies (Note 4)
Stockholders' equity
Preferred stock, $0.01 par value; 20,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value; 120,000 shares authorized; 66,306 shares and 65,496 shares issued and outstanding at September 30, 2016 and December 31, 2015 respectively	663	655
Additional paid-in capital	228,323	226,174
Accumulated other comprehensive loss	(1)	(16)
Accumulated deficit	(199,542)	(181,972)
Total stockholders' equity	29,443	44,841
Total liabilities and stockholders' equity	$ 40,372	$ 48,692

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3-4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3
-Subparagraph a(1)
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 4
-Article 5