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Stock-Based Compensation - Schedule of Stock Option Awards and Restricted Stock Grants (Details)	9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Weighted average contractual terms of equity awards (in years), equity awards, outstanding, ending balance	9 years 4 months 24 days
Weighted average contractual terms of equity awards (in years), equity awards exercisable, ending balance	9 years 3 months 19 days
Stock Options [Member]
Equity awards, outstanding, beginning balance | shares	703,442
Equity awards granted | shares	2,629,004
Vested and issued | shares
Equity awards forfeited, cancelled or expired | shares	(113,701)
Equity awards, outstanding, ending balance | shares	3,218,745
Aggregate intrinsic value of outstanding awards, ending balance | $	$ 1,384,245
Equity awards exercisable, ending balance | shares	1,677,998
Aggregate intrinsic value of awards exercisable, ending balance | $	$ 706,552
Weighted average exercise price, equity awards, outstanding, beginning balance | $ / shares	$ 10.34
Weighted average exercise price, equity awards granted | $ / shares	2.26
Weighted average exercise price, vested and issued | $ / shares
Weighted average exercise price, equity awards forfeited, cancelled or expired | $ / shares	40.23
Weighted average exercise price, equity awards, outstanding, ending balance | $ / shares	2.67
Weighted average exercise price, equity awards exercisable, ending balance | $ / shares	$ 2.94
Restricted Stock Awards [Member]
Non-vested restricted stock outstanding, equity awards, outstanding, beginning balance | shares
Non-vested restricted stock outstanding, equity awards granted | shares	35,000
Non-vested restricted stock outstanding, vested and issued | shares	(6,000)
Non-vested restricted stock outstanding, equity awards forfeited, cancelled or expired | shares
Non-vested restricted stock outstanding, equity awards, outstanding, ending balance | shares	29,000
Non-vested restricted stock outstanding, aggregate intrinsic value of outstanding awards, ending balance | $	$ 1,700
Weighted average grant date fair value, equity awards, outstanding, beginning balance | $ / shares
Weighted average grant date fair value, equity awards granted | $ / shares	2.71
Weighted average grant date fair value, vested and issued | $ / shares	2.64
Weighted average grant date fair value, equity awards forfeited, cancelled or expired | $ / shares
Weighted average grant date fair value, equity awards, outstanding, ending balance | $ / shares	$ 2.72

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

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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.

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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.

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Weighted average price of options that were either forfeited or expired.

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Net number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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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.

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