Shareholders' Equity (Detail Textuals 3) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock, shares authorized	4,000,000	4,000,000
2012 Long-Term Incentive Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock, shares authorized	300,000
Rights Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Percentage of beneficial ownership	25% or more
Number of business days	10 days
Exercise price	$ 32
Right entitle to purchase, description	Each right would entitle the holder to purchase one one-hundredth of a share of Series A Junior Participating Preferred Stock.
Shareholders rights plan, description	exchange two shares of common stock or two one-hundredths of a share of preferred stock for each right