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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2018
Summary of Restricted Stock Award Activity | A summary of restricted stock award activity during the six months ended June 30, 2018 is as follows:
|  |  |  |  |  |  |  | Weighted |
|  | Number of Shares |  |  | Average |
|  | Unvested |  |  | Vested |  |  | Price |
Restricted stock awards outstanding at December 31, 2017 |  |  | 6,979,596 |  |  |  | 5,537,556 |  |  | $ | 0.41 |
Vested |  |  | (2,088,739 | ) |  |  | 2,088,739 |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  |
Restricted stock awards outstanding at June 30, 2018 |  |  | 4,890,857 |  |  |  | 7,626,295 |  |  | $ | 0.72 |
Schedule of Fair Value of Stock Options Granted | The fair value of stock options granted during the six months ended June 30, 2018 were calculated using the Black-Scholes option-pricing model utilizing the following assumptions:
Risk-free interest rate |  |  | 2.60% to 2.77 | %
Expected dividend yield |  |  | 0 | %
Expected volatility |  |  | 108.59% to 113.87 | %
Expected life |  |  | 6 years |
Summary of Stock Option Activity | A summary of stock option activity, including options issued in the form of warrants, during the six months ended June 30, 2018 is as follows:
|  |  |  |  |  |  |  | Weighted |
|  |  |  |  |  |  |  | Average |
|  |  |  |  | Weighted |  |  | Remaining |
|  | Number |  |  | Average |  |  | Contractual |
|  | of |  |  | Exercise |  |  | Life |
|  | Shares |  |  | Price |  |  | (in Years) |
Stock options outstanding at December 31, 2017 |  |  | 2,176,637 |  |  | $ | 1.25 |  |  |  |  |
Granted |  |  | 2,021,250 |  |  |  | 1.74 |  |  |  |  |
Exercised |  |  | (125,000 | ) |  |  | 0.17 |  |  |  |  |
Forfeited |  |  | (189,884 | ) |  |  | 1.43 |  |  |  |  |
Expired |  |  | — |  |  |  | — |  |  |  |  |
Stock options outstanding at June 30, 2018 |  |  | 3,883,003 |  |  | $ | 1.49 |  |  |  | 9.29 |
Stock options exercisable at June 30, 2018 |  |  | 937,271 |  |  | $ | 1.25 |  |  |  | 8.78 |
Schedule of Exercise Prices of Common Stock Options | The exercise prices of common stock options, including options issued in the form of warrants, outstanding and exercisable are as follows at June 30, 2018:
|  |  | Options |  |  | Options |
Exercise |  |  | Outstanding |  |  | Exercisable |
Price |  |  | (Shares) |  |  | (Shares) |
Under $1.01 |  |  |  | 25,000 |  |  |  | 25,000 |
$1.01 to $1.25 |  |  |  | 1,766,753 |  |  |  | 717,354 |
$1.26 to $1.50 |  |  |  | 125,000 |  |  |  | 1,949 |
$1.51 to $1.75 |  |  |  | 665,000 |  |  |  | 105,000 |
$1.76 to $2.00 |  |  |  | 1,055,000 |  |  |  | 87,968 |
$2.01 to $2.25 |  |  |  | 205,000 |  |  |  | — |
Over $2.25 |  |  |  | 41,250 |  |  |  | — |
|  |  |  | 3,883,003 |  |  |  | 937,271 |
Schedule of Common Stock Financing Warrants Outstanding and Exercisable | The exercise prices of common stock financing warrants outstanding and exercisable are as follows at June 30, 2018:
|  |  | Financing |  |  | Financing |
|  |  | Warrants |  |  | Warrants |
Exercise |  |  | Outstanding |  |  | Exercisable |
Price |  |  | (Shares) |  |  | (Shares) |
$0.20 |  |  |  | 327,490 |  |  |  | 327,490 |
$1.15 |  |  |  | 119,565 |  |  |  | 119,565 |
$1.19 |  |  |  | 1,500,000 |  |  |  | 1,500,000 |
$1.20 |  |  |  | 210,438 |  |  |  | 210,438 |
$1.30 |  |  |  | 216,120 |  |  |  | 216,120 |
$2.50 |  |  |  | 60,000 |  |  |  | 60,000 |
|  |  |  | 2,433,613 |  |  |  | 2,433,613 |
Common Stock Warrant [Member] |
Summary of Warrant Activity | A summary of Channel Program common stock warrant activity during the six months ended June 30, 2018 is as follows:
|  |  |  |  |  |  |  | Weighted |
|  |  |  |  |  |  |  | Average |
|  |  |  |  | Weighted |  |  | Remaining |
|  | Number |  |  | Average |  |  | Contractual |
|  | of |  |  | Exercise |  |  | Life |
|  | Shares |  |  | Price |  |  | (in Years) |
Channel Program warrants outstanding at January 1, 2018 |  |  | 1,303,832 |  |  | $ | 1.48 |  |  |  |  |
Issued |  |  | 295,000 |  |  |  | 1.74 |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |
Forfeited |  |  | (182,200 | ) |  |  | 1.33 |  |  |  |  |
Expired |  |  | — |  |  |  | — |  |  |  |  |
Channel Program warrants outstanding at June 30, 2018 |  |  | 1,416,633 |  |  | $ | 1.49 |  |  |  | 4.11 |
Channel Program warrants exercisable at June 30, 2018 |  |  | 252,125 |  |  | $ | 1.46 |  |  |  | 4.06 |
Common Stock Financing Warrant [Member] |
Summary of Warrant Activity | A summary of common stock financing warrant activity during the six months ended June 30, 2018 is as follows:
|  |  |  |  |  |  |  | Weighted |
|  |  |  |  |  |  |  | Average |
|  |  |  |  | Weighted |  |  | Remaining |
|  | Number |  |  | Average |  |  | Contractual |
|  | of |  |  | Exercise |  |  | Life |
|  | Shares |  |  | Price |  |  | (in Years) |
Financing warrants outstanding at December 31, 2017 |  |  | 1,289,172 |  |  | $ | 0.29 |  |  |  |  |
Issued |  |  | 1,986,558 |  |  |  | 1.24 |  |  |  |  |
Exercised |  |  | (842,117 | ) |  |  | 0.20 |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  |
Expired |  |  | — |  |  |  | — |  |  |  |  |
Financing warrants outstanding at June 30, 2018 |  |  | 2,433,613 |  |  | $ | 1.10 |  |  |  | 4.70 |
Financing warrants exercisable at June 30, 2018 |  |  | 2,433,613 |  |  | $ | 1.10 |  |  |  | 4.70 |

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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=116856206&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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