Stock Option Plans - Virginia Partners Stock Option Activity (Details) - Virginia Partners Stock Option Plan - Stock options - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Outstanding shares
Outstanding at the beginning of year	247,705
Exercised	(14,601)
Outstanding at the end of year	233,104	247,705
Options exercisable at end of year	233,104
Weighted Average Exercise Price
Balance at the beginning of year	$ 6.14
Exercised	5.83
Balance at the end of year	6.16	$ 6.14
Options exercisable at end of year	$ 6.16
Weighted-Average Remaining Contractual Life
Outstanding at end of year	3 years 9 months 15 days	3 years 9 months 22 days
Intrinsic value, Balance at the end of year	$ (85,938)

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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