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Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 141 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013
Cash flows used in operating activities: |  |  |
Net loss | $ (3,993) | $ (3,480) | $ (71,987)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Gain on patent rights assignment |  |  | (2,000)
Gain on bargain purchase |  |  | (25,282)
Depreciation and amortization | 24 | 34 | 1,804
Non-cash interest expense |  |  | 211
Share-based compensation | 125 | 243 | 2,713
Issuance of warrants for lease termination |  |  | 377
Accretion of liabilities |  |  | 152
Impairment of property and equipment |  |  | 125
Loss on impairment of in-process research and development |  |  | 6,000
Write-off of deferred tax liability |  |  | (2,281)
Gain on marketable securities available for sale |  |  | (263)
(Gain) loss from disposal of property and equipment |  |  | 83
Other, net |  |  | 267
Change in operating assets and liabilities (net of amounts acquired): |  |  |
Other current assets | (80) | 219 | 2,740
Other assets | 44 | 60 | 7,370
Accounts payable | 382 | (141) | (1,743)
Accrued expenses and other liabilities | 98 | (318) | (19,123)
Deferred rent | (16) | (25) |
Net cash used in operating activities | (3,416) | (3,408) | (100,837)
Cash flows (used in) provided by investing activities: |  |  |
Cash received from Merger |  |  | 30,392
Payment of deferred transaction costs |  |  | (1,186)
Purchase of property and equipment | (28) | (1) | (1,907)
Proceeds from sale of marketable securities |  |  | 15,369
Proceeds from sale of property and equipment |  |  | 358
Proceeds from patent rights assignment |  |  | 2,000
Net cash (used in) provided by investing activities | (28) | (1) | 45,026
Cash flows provided by (used in) financing activities: |  |  |
Proceeds from issuance of convertible notes payable and related warrants for common stock |  |  | 10,841
Proceeds from issuance of bank note payable |  |  | 4,000
Proceeds from stock subject to repurchase |  |  | 38
Proceeds from the issuance of preferred stock | 20,000 |  | 52,316
Payment of offering costs | 20 |  |
Proceeds from the issuance of common stock | 1,741 | 953 | 15,850
Repayment of principal on bank note payable |  |  | (4,000)
Repayment of principal on convertible notes payables |  |  | (105)
Repayment of principal on vendor finance agreement | (174) | (134) | (454)
Net cash provided by (used in) financing activities | 19,156 | 547 | 74,443
Net increase (decrease) in cash and cash equivalents | 15,712 | (2,862) | 18,632
Cash and cash equivalents, beginning of period | 2,920 | 5,943 |
Cash and cash equivalents, end of period | 18,632 | 3,081 | 18,632
Supplemental cash flow information: |  |  |
Interest paid | 3 | 3 | 118
Supplemental disclosure of noncash investing and financing transactions: |  |  |
Accrued interest on notes payable converted to equity |  |  | 163
Warrant issued in connection with credit facility |  |  | 111
Accrued deferred transaction costs |  |  | 482
Vendor finance agreement |  |  |
Preferred Stock |  |  |
Cash flows provided by (used in) financing activities: |  |  |
Payment of offering costs | (2,083) |  | (2,329)
Common Stock |  |  |
Cash flows provided by (used in) financing activities: |  |  |
Payment of offering costs | $ (328) | $ (272) | $ (1,714)

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