Equity - Options (Details) - USD ($)	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Stock Based Compensation Plans
Options exercised (in shares)	8,334	6,667
Weighted Average Exercise Price (in dollars per share)	$ 24.31	$ 23.79
Value of options exercised	$ 202,566	$ 159,000
Market value of options on the date of exercise	$ 410,797	$ 311,000
Options outstanding at end of the period (in shares)	25,000
Options exercisable at end of the period (in shares)	25,000
2015 Plan
Stock Based Compensation Plans
Total shares reserved for issuance of common stock related to the conversion of preferred stock	1,400,000
Stock options granted (in shares)	0	0
Stock options
Stock Based Compensation Plans
Compensation expense related to share-based award	$ 2,000	$ 11,000

Represents the market value as of the exercise date of the common shares purchased during the period.

No definition available.

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- Definition

Represents the option value of the share options (or share units) exercised during the current period.

+ References

No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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- Definition

Number of share options (or share units) exercised during the current period.

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