Stockholder's Equity - Summary of Stock Option Activity (Details)	6 Months Ended
Jun. 30, 2019 $ / shares shares
Equity [Abstract]
Number of Options Outstanding, Beginning Balance \| shares	895,858
Number of Options Outstanding, Granted \| shares	79,000
Number of Options Outstanding, Exercised \| shares	(3,167)
Number of Options Outstanding, Canceled \| shares	(32,334)
Number of Options Outstanding, Ending Balance \| shares	939,357
Number of Options Exercisable, Ending Balance \| shares	545,521
Weighted- Average Exercise Price Options Outstanding, Beginning Balance \| $ / shares	$ 5.62
Weighted- Average Exercise Price Options Outstanding, Granted \| $ / shares	5.03
Weighted- Average Exercise Price Options Outstanding, Exercised \| $ / shares	4.04
Weighted- Average Exercise Price Options Outstanding, Canceled \| $ / shares	4.73
Weighted- Average Exercise Price Options Outstanding, Ending Balance \| $ / shares	5.61
Weighted- Average Exercise Price Options Exercisable, Ending Balance \| $ / shares	$ 5.69

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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.

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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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- Definition

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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-Publisher FASB
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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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