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Summary of Significant Accounting Policies (Details 2) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Summary Of Significant Accounting Policies
Denominator for basic net income (loss) per share - weighted average shares	11,729,000	11,758,000	11,784,000	11,698,000
Effect of dilutive securities: Stock options and restricted stock units and awards	$ 283,000	$ 19,000	$ 242,000	$ 0
Denominator for diluted net income (loss) per share - weighted average shares	12,012,000	11,777,000	12,026,000	11,698,000

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Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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