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Stock-Based Compensation - Schedule of Stock Option Awards and Restricted Stock Grants (Details) - USD ($) | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Weighted Average Grant Date Fair Value, Equity awards granted | $ 1.86 | $ 2.36
Stock Options [Member] |  |
Number Outstanding, Outstanding, Beginning Balance | 3,148,743 |
Number Outstanding, Equity awards granted | 840,754 |
Number Outstanding, Vested and issued |  |
Number Outstanding, Forfeited, cancelled or expired | (38,355) |
Number Outstanding, Ending Balance | 3,951,142 |
Number Outstanding, Exercisable |  |
Weighted Average Exercise Price, Outstanding, Beginning Balance | $ 2.67 |
Weighted Average Exercise Price, Equity awards granted | 2.14 |
Weighted Average Exercise Price, Vested and issued |  |
Weighted Average Exercise Price, Forfeited, cancelled or expired | 2.38 |
Weighted Average Exercise Price, Outstanding, Ending Balance | 2.56 |
Weighted Average Exercise Price, Exercisable | $ 2.77 |
Weighted Average Remaining Contractual Term (years), Outstanding, Ending Balance | 8 years 8 months 12 days |
Weighted Average Remaining Contractual Term (years), Exercisable | 8 years 4 months 24 days |
Aggregate Intrinsic Value, Outstanding, Ending Balance | $ 2,440,699 |
Aggregate Intrinsic Value, Exercisable | $ 33,495 |
Restricted Stock Awards [Member] |  |
Non-vested stock awards outstanding, Beginning Balance | 22,500 |
Non-vested stock awards outstanding, Equity awards granted | 24,750 |
Non-vested stock awards outstanding, Vested and issued | (25,500) |
Non-vested stock awards outstanding, Equity awards forfeited, cancelled or expired |  |
Non-vested stock awards outstanding, Ending Balance | 21,750 |
Non-vested stock awards outstanding, Aggregate intrinsic value, Ending Balance | $ 27,500 |
Weighted Average Grant Date Fair Value, Beginning Balance | $ 2.72 |
Weighted Average Grant Date Fair Value, Equity awards granted | 2.07 |
Weighted Average Grant Date Fair Value, Vested and issued | 2.49 |
Weighted Average Grant Date Fair Value, Forfeited, cancelled or expired |  |
Weighted Average Grant Date Fair Value, Ending Balance | $ 2.22 |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + 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)(iv)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 Number of options outstanding, including both vested and non-vested options. + 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 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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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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