Shareholders Equity - Stock Option Activity (Details) - Stock options - $ / shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Share Compensation Plan
Common Shares available for future option issuances	755,000
Number of Options Outstanding
Balance at beginning of period (in shares)	290,750	330,750
Exercised (in shares)	(25,000)
Expired/Forfeited (in shares)	(20,750)	(40,000)
Options outstanding, end of period (in shares)	245,000	290,750
Exercisable at period-end (in shares)	206,670	210,249
Weighted average exercise price
Balance at beginning of period (in dollars per share)	$ 5.02	$ 5.14
Exercised (in dollars per share)	2.17
Expired/Forfeited (in dollars per share)	5.37	6.00
Balance at period-end (in dollars per share)	5.27	5.02
Exercisable at period-end (in dollars per share)	$ 5.32	$ 5.02

Aggregate number of common shares reserved for future issuance.

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

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