CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 22,728	$ 24,189
Prepaid expenses and other current assets	3,966	4,640
Current assets of discontinued operations	100	171
Total current assets	26,794	29,000
Property, plant and equipment (net)	255	387
Total assets	27,049	29,387
Current liabilities:
Accounts payable	1,616	2,792
Accrued and other current liabilities	3,572	4,626
Current liabilities of discontinued operations	75	75
Total current liabilities	5,263	7,493
Other liabilities	186	206
Total liabilities	$ 5,449	$ 7,699
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2014 and September 30, 2015; 335,273 shares issued and outstanding at December 31, 2014 and September 30, 2015. Aggregate preference in liquidation of $3,989,749 at December 31, 2014 and September 30, 2015.
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2014 and September 30, 2015; 23,199,469 and 34,702,910 shares issued and outstanding at December 31, 2014 and September 30, 2015, respectively.	$ 34	$ 23
Additional paid-in capital	341,891	330,962
Accumulated other comprehensive loss	(540)	(480)
Accumulated deficit	(319,785)	(308,817)
Total stockholders' equity	21,600	21,688
Total liabilities and stockholders' equity	$ 27,049	$ 29,387

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

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).