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Stock-Based Compensation - Summary of Stock Options Outstanding (Details)	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Options Granted	436,217
Options Exercised
Stock Options [Member]
Options Outstanding, Beginning balance	434,012
Options Granted	180,000
Options Exercised
Options Forfeited	(17,937)
Options Outstanding, Ending balance	596,075
Options Exercisable, Ending balance	416,075
Weighted Average Exercise Price, Outstanding, Beginning balance | $ / shares	$ 4.62
Weighted Average Exercise Price, Granted | $ / shares	3.01
Weighted Average Exercise Price, Exercised | $ / shares
Weighted Average Exercise Price, Forfeited | $ / shares	(12.43)
Weighted Average Exercise Price, Outstanding, Ending balance | $ / shares	3.90
Weighted Average Exercise Price, Exercisable, Ending balance | $ / shares	$ 4.28

X

- 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

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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 2
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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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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.

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

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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 price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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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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Number of share options (or share units) exercised during the current period.

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