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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summarizes Stock Option Activity Under Equity Intensive Plan | The following table summarizes stock option activity under the equity incentive plans for the nine months ended September 30, 2015:
|  | Number of Shares |  |  | Weighted- Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted- Average Remaining Contractual Life (in years) |
Outstanding at December 31, 2014 |  |  | 5,137,914 |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted |  |  | 5,713,899 |  |  | $ | 7.92 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | (7,715 | ) |  | $ | 0.42 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (1,032,742 | ) |  | $ | 0.82 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2015 |  |  | 9,811,356 |  |  | $ | 4.97 |  |  | $ | 83,335 |  |  |  | 7.65 |
Vested and Exercisable at September 30, 2015 |  |  | 4,046,009 |  |  | $ | 5.32 |  |  | $ | 34,694 |  |  |  | 8.18 |
Summary of Options Outstanding and Vested | The following table provides a summary of options outstanding and vested as of September 30, 2015:
Exercise Prices |  |  | Number Outstanding |  |  | Weighted- Average Life (in Years) |  |  | Number Exercisable |  |  | Weighted- Average Life (in Years) |
$0.22 |  |  |  | 1,404,060 |  |  |  | 8.46 |  |  |  | 987,472 |  |  |  | 8.46 |
$0.42 |  |  |  | 1,115,144 |  |  |  | 8.84 |  |  |  | 949,281 |  |  |  | 8.78 |
$1.76 |  |  |  | 1,578,253 |  |  |  | 9.20 |  |  |  | 357,420 |  |  |  | 9.20 |
$2.00 |  |  |  | 2,406,949 |  |  |  | 9.37 |  |  |  | 792,673 |  |  |  | 9.37 |
$2.20 |  |  |  | 1,851,500 |  |  |  | 3.48 |  |  |  | 231,438 |  |  |  | 3.48 |
$ | 25.00 |  |  |  | 1,455,450 |  |  |  | 6.73 |  |  |  | 727,725 |  |  |  | 6.73 |
|  |  |  |  | 9,811,356 |  |  |  | 7.65 |  |  |  | 4,046,009 |  |  |  | 8.18 |
Weighted Average Assumptions of Fair Value of Stock Options Under Black-Scholes Option Pricing Model | The Company uses a Black-Scholes option-pricing model to determine the fair value of stock-based compensation under ASC Topic 718, Stock Compensation. The assumptions used for employee and non-employee stock options are presented in the table below:
|  | Nine Months Ended September 30, |
|  | 2015 |  |  | 2014 |
|  | Employee Grants |  |  | Non-Employee Grants |  |  | Employee Grants |  |  | Non-Employee Grants |
Expected term (years) |  | 4.00-5.52 |  |  |  | 10.00 |  |  | 5.00-5.52 |  |  |  | 10.00 |
Risk-free interest rate |  | 1.45%-1.79% |  |  |  | 2.14% |  |  | 1.58%-1.89% |  |  |  | 2.70% |
Expected volatility |  |  | 80% |  |  |  | 80% |  |  |  | 91% |  |  |  | 91% |
Dividend yield |  |  | 0% |  |  |  | 0% |  |  |  | 0% |  |  |  | 0% |
Weighted-average grant date fair value |  | $12.08 |  |  | $5.19 |  |  | $0.16 |  |  | $0.19 |
Restricted Stock Units Activity | The following table summarizes the restricted stock units activity under the 2015 Plan:
|  | Number of Restricted Stock Units Outstanding |  |  | Weighted-Average Grant Date Fair Value |
Unvested balance at December 31, 2014 |  |  | - |  |  |  |  |
Granted |  |  | 970,300 |  |  | $ | 25.00 |
Vested, net of shares withheld for employee payroll taxes |  |  | (388,538 | ) |  | $ | 25.00 |
Shares withheld for employee payroll taxes |  |  | (96,612 | ) |  | $ | 25.00 |
Unvested balance at September 30, 2015 |  |  | 485,150 |  |  | $ | 25.00 |
Stock Based Compensation Expenses Included in Operations Statement | The following table presents all stock-based compensation as included in the Company’s condensed consolidated statements of operations:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Stock-based compensation expense: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants for Class A common stock to an officer and a director related to Inex Bio, Inc. acquisition (Note 3) |  | $ | — |  |  | $ | — |  |  | $ | 22,747 |  |  | $ | — |
Warrants for Class A common stock to an officer |  |  | 4,745 |  |  |  | — |  |  |  | 80,663 |  |  |  |  |
Employee stock options |  |  | 16,424 |  |  |  | 26 |  |  |  | 20,033 |  |  |  | 190 |
Non-employee stock options |  |  | 784 |  |  |  | 3 |  |  |  | 3,074 |  |  |  | 6 |
Restricted stock units |  |  | 14,150 |  |  |  | — |  |  |  | 14,150 |  |  |  | — |
|  | $ | 36,103 |  |  | $ | 29 |  |  | $ | 140,667 |  |  | $ | 196 |
Stock-based compensation expense in operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  | $ | 364 |  |  | $ | — |  |  | $ | 1,140 |  |  | $ | — |
Selling, general and administrative |  |  | 35,739 |  |  |  | 29 |  |  |  | 139,527 |  |  |  | 196 |
|  | $ | 36,103 |  |  | $ | 29 |  |  | $ | 140,667 |  |  | $ | 196 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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