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Stock-Based Compensation (Details 1) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Shares, Options outstanding at beginning of year	501,603	302,088
Shares, Granted	41,421	191,730
Shares, Exercised	(49,700)	0
Shares, Forfeited	0	(15,365)
Shares, Balance at September 30	493,324	478,453
Shares, Options exercisable at Shares, September 30	265,531	178,275
Weighted Average Exercise Price, Options outstanding at beginning of year	$ 7.58	$ 5.91
Weighted Average Exercise Price, Granted	21.85	8.56
Weighted Average Exercise Price, Exercised	7.60	0
Weighted Average Exercise Price, Forfeited	0	3.60
Weighted Average Exercise Price, Balance at September 30	8.75	7.05
Weighted Average Exercise Price, Options exercisable at September 30:	6.83	5.65
Weighted Average Grant Date Fair Value for Options Granted During the period:	$ 15.25	$ 5.42

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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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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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 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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