Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 10,541	$ 4,182
Prepaid expenses and other current assets	413	577
Total current assets	10,954	4,759
Property and equipment, net	722	786
Long-term restricted cash	204	204
Goodwill	10,914	10,914
Total assets	22,794	16,663
Current liabilities:
Loan payable, net of debt discount and issuance costs	2,661	2,586
Accounts payable	235	747
Accrued expenses	1,439	1,317
Total current liabilities	4,335	4,650
Loan payable, net of current portion, debt discount and issuance costs	2,522	3,217
Derivative liability	35	35
Total liabilities	6,892	7,902
Commitments (Note 14)
Stockholders' Equity (Deficit):
Preferred stock, $0.0001 par value - 500,000 authorized and 0 issued and outstanding at March 31, 2017 and December 31, 2016
Common stock, $0.0001 par value - 100,000,000 shares authorized; 18,475,202 and 14,850,526 shares issued and outstanding, including vested restricted stock units of 49,654 and 99,308, at March 31, 2017 and December 31, 2016, respectively.	2	1
Additional paid-in capital	175,329	164,706
Accumulated deficit	(159,429)	(155,946)
Total stockholders' equity	15,902	8,761
Total liabilities and stockholders' equity	$ 22,794	$ 16,663

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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- 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).