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Share-Based Payment Awards (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Stock Option Activity | A summary of stock option activity is as follows:
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Options outstanding as of December 31, 2017 |  |  | 1,090,000 |  |  | $ | 1.24 |  |  |  | 9.7 |  |  | $ | 151 |
Issued |  |  | 225,000 |  |  |  | 4.26 |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeited/Cancelled |  |  | (20,000 | ) |  |  | 0.21 |  |  |  |  |  |  |  |  |
Options outstanding as of December 31, 2018 |  |  | 1,295,000 |  |  | $ | 1.78 |  |  |  | 8.3 |  |  | $ | 5,627 |
Options exercisable at December 31, 2018 |  |  | 404,167 |  |  | $ | 1.06 |  |  |  | 6.9 |  |  | $ | 2,046 |
Options vested and expected to vest at December 31, 2018 |  |  | 1,245,000 |  |  | $ | 1.79 |  |  |  | 8.3 |  |  | $ | 5,390 |
Schedule of Assumptions Used to Calculate Fair Value of Options Granted | The assumptions used to calculate the fair value of options granted during the periods ended December 31, 2018 and 2017 under the BSM were as follows:
|  | December 31, 2018 |  |  | December 31, 2017 |
Expected dividends |  |  | — | % |  |  | — | %
Expected volatility |  |  | 85 | % |  |  | 85 | %
Risk-free interest rate |  |  | 2.8-2.9 | % |  |  | 1.7-2.3 | %
Expected term |  |  | 6.3 years |  |  |  | 5.8-10 years |
Weighted average fair value |  | $ | 3.39 |  |  | $ | 0.91 |
Summary of Activity for Restricted Stock Awards | A summary of activity for RSAs and RSUs is as follows:
Restricted Stock Awards |  | Number of shares |
Unvested as of December 31, 2017 |  |  | 2,500,000 |
Issued |  |  | 218,980 |
Vested |  |  | (2,406,480 | )
Forfeited/Cancelled |  |  | — |
Unvested as of December 31, 2018 |  |  | 312,500 |
Summary of Activity for Restricted Stock Units |
Restricted Stock Units |  | Number of shares |
Unvested as of December 31, 2017 |  |  | 50,000 |
Issued |  |  | — |
Vested |  |  | (50,000 | )
Forfeited/Cancelled |  |  | — |
Unvested as of December 31, 2018 |  |  | — |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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