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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Summary of Operations in Different Geographic Regions | Information about the Company’s operations in different geographic regions is presented in the tables below:
|  | December 31, 2016 |  |  | December 31, 2015 |
|  | (in thousands) |
Long-lived assets: |  |  |  |  |  |  |  |
United States |  | $ | 3,860 |  |  | $ | 5,204 |
Israel |  |  | — |  |  |  | 9 |
Total long-lived assets |  | $ | 3,860 |  |  | $ | 5,213 |
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis | The fair value of the warrants was determined using a Monte Carlo simulation model. This model incorporated several assumptions at each valuation date including: the price of the Company’s common stock on the date of valuation, the historical volatility of the price of the Company’s common stock, the remaining contractual term of the warrant and estimates of the probability of a fundamental transaction occurring. See Note 8, Capital Stock, for further discussion of the private placement.
Description |  | Total |  |  | Quoted prices in active markets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
|  | (in thousands) |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 30,318 |  |  | $ | 30,318 |  |  | $ | — |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant liability |  |  | 13,197 |  |  |  | — |  |  |  | — |  |  |  | 13,197 |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  |  | 25,764 |  |  |  | 25,764 |  |  |  | — |  |  |  | — |
Schedule of Reconciliation of Liabilities Measured at Fair Value | The following table provides a reconciliation of all liabilities measured at fair value using Level 3 significant unobservable inputs:
|  | As of December 31, 2016 |
|  | (in thousands) |
Beginning balance, January 1, 2016 |  | $ | — |
Issuance of warrants, |  |  | 30,704 |
Change in fair value of warrant liability |  |  | (17,507 | )
Ending balance |  | $ | 13,197 |
Schedule of Depreciation and Amortization using Straight-line Method over Estimated Useful Lives of Assets | The Company provides for depreciation and amortization using the straight-line method over the estimated useful lives of the assets, which are as follows:
Asset Category |  | Estimated Useful Lives
Office equipment |  | 3 to 5 years
Laboratory equipment |  | 3 to 5 years
Leasehold improvements |  | Shorter of the remaining lease term or useful life
Summary of Intangible Assets, Net of Accumulated Impairment Charges | Intangible asset, net of accumulated impairment charges, are summarized as follows:
|  | As of December 31, 2016 |  |  | As of December 31, 2015 |
|  | Cost |  |  | Accumulated Impairment |  |  | Net Book Value |  |  | Cost |  |  | Accumulated Impairment |  |  | Net Book Value |
|  | (in thousands) |  |  | (in thousands) |
IPR&D |  | $ | 630 |  |  | $ | (630 | ) |  | $ | — |  |  | $ | 630 |  |  | $ | (430 | ) |  | $ | 200 |
|  | $ | 630 |  |  | $ | (630 | ) |  | $ | — |  |  | $ | 630 |  |  | $ | (430 | ) |  | $ | 200 |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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