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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |
Net loss | $ (27,670) | $ (23,754)
Adjustment to reconcile net loss to net cash used in operating activities: |  |
Gain on extinguishment of debt | (766) | 0
Non-cash In-process research and development impairment charge | 9,100 | 0
Non-cash interest expense | 134 | 0
Amortization of research and development expense | 0 | 258
Deferred income taxes | (1,316) |
Non-cash stock-based compensation | 395 | 3,169
Fair value of common stock issued in exchange for services | 0 | 449
Fair value of common stock issued in connection with litigation settlements | 1,250 | 0
Fair value of common stock issued in connection with litigation settlements | 0 | 941
Change in fair value of common stock warrants | (5,302) | 0
Change in fair value of contingent consideration | 3,032 | 0
Loss on settlement of liability-classified warrants | 727 | 0
Severance costs paid by Galena | 0 | 1,883
Changes in operating assets and liabilities: |  |
Prepaid expenses and other assets | 212 | 73
Accounts payable | (7,936) | 8,366
Accrued expenses and other current liabilities | (2,282) | (2,374)
Net cash used in operating activities | (30,422) | (10,989)
Cash flows from investing activities: |  |
Net cash acquired from acquisition of Galena | 0 | 12,158
Net cash used from investing activities | 0 | 12,158
Cash flows from financing activities: |  |
Proceeds from issuance of Series A convertible preferred stock and common stock warrants, net of issuance costs | 9,647 | 0
Proceeds from issuance of common stock, net of issuance costs | 21,564 | 6,007
Dividends paid | (487) | 0
Principal payments on long-term debt | (7,601) | (473)
Net cash provided by financing activities | 23,123 | 5,534
Net decrease in cash, cash equivalents, restricted cash, and restricted cash equivalents | (7,299) | 6,703
Cash, cash equivalents, restricted cash, and restricted cash equivalents at the beginning of period | 12,750 | 6,047
Cash, cash equivalents, restricted cash, and restricted cash equivalents at the end of period | 5,451 | 12,750
Supplemental disclosure of cash flow information: |  |
Cash received during the periods for interest | 186 | 0
Cash paid during the periods for interest | 321 | 0
Supplemental disclosure of non-cash investing and financing activities: |  |
Fair value of liability-classified warrants issued in connection with Series A convertible preferred stock recorded as issuance cost | 5,530 |
Deemed dividend arising from beneficial conversion feature of Series A convertible preferred stock | 4,436 | 0
Repayment of interest and principal on long-term debt through issuance of common stock | 3,721 | 0
Reclassification of warrant liabilities upon exchange for shares of common stock | 285 | 0
Impact of anti-dilution protection on liability-classified warrants | 491 | 0
Debt issued in connection with warrant exchange agreements | 966 | 0
Shares issued in connection with acquisition of Galena | 0 | 12,487
Fair value of options assumed in connection with acquisition of Galena | 0 | 32
Related party payable settled in shares | 0 | 228
Memorial Sloan Kettering Cancer Center payable settled in shares | 0 | 150
Deemed dividend associated with conversion of 2015 Sely Note and common stock warrant issuance to Equilibria | 0 | 675
Convertible Debt Two Thousand Fifteen Shareholder Notes |  |
Supplemental disclosure of non-cash investing and financing activities: |  |
Stock issued | 0 | 1,294
Convertible Debt Two Thousand Sely Note |  |
Supplemental disclosure of non-cash investing and financing activities: |  |
Stock issued | $ 0 | $ 6,064

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- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholder, which takes precedence over common stockholders in the event of liquidation and from issuance of rights to purchase common shares at a predetermined price. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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