Stock-Based Compensation Plans (Details Narrative) $ / shares in Units, $ in Thousands	6 Months Ended
Jun. 30, 2019 USD ($) Years shares	Jun. 28, 2019 $ / shares
Share-based Payment Arrangement [Abstract]
Number of stock option plans	2
Options expire from date of grant	10 years
Exercisable installments	Immediate or 20% or 25%
Shares available for future issuance \| shares	490,310
Aggregate intrinsic value of exercisable in-the-money options	$ 2,772
Aggregate intrinsic value of outstanding in-the-money options	3,166
Market close price \| $ / shares		$ 55.77
Total unrecognized compensation cost of options granted but not yet vested	$ 346
Weighted average period for compensation to be recognized \| Years	4.0
Gains realized by option holders	$ 94
Expected minimum volatility	29.00%
Expected maximum volatility	43.00%
Risk-free interest rate minimum	0.60%
Risk-free interest rate maximum	2.90%
Expected life minimum \| Years	3
Expecited life maximum \| Years	7
Dividend yield	0.00%

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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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Price of a single share of a number of saleable stocks of a company.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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