Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Benefit Plans
Administrative expense	$ 2,400	$ 1,100	$ 1,700
Discretionary contribution	250,000	265,000	255,000
Deferred Compensation Expense Non Qualified Plan	$ 135,000	$ 149,000	$ 211,000