Stockholders' Equity - Schedule of Stock Options Activity (Details) - Non-Qualified Stock Option [Member] - $ / shares	3 Months Ended	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Options outstanding, beginning of year	279,167	531,667	531,667
Number of options, granted
Number of options, redeemed
Number of options, exercised
Number of options, expired / terminated
Number of options outstanding, end of year	279,167	531,667	279,167
Number of options exercisable, end of year	279,167	521,667
Weighted exercise price outstanding, beginning of year	$ 2.34	$ 1.80	$ 1.80
Weighted average exercise price, granted
Weighted average exercise price, redeemed
Weighted average exercise price, exercised
Weighted average exercise price, expired / terminated
Weighted average exercise price outstanding, end of quarter	2.34	1.80	$ 2.34
Weighted average exercise price exercisable, end of quarter	$ 2.34	$ 1.82

Number of options, redeemed.

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Weighted average exercise price, redeemed.

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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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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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 grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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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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