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Schedule of 2003 Stock Option and Appreciation Rights Plan (Details) - shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Options outstanding, beginning of year 2,175,000 2,165,000
Options forfeited (205,000) 0
Options exercised (40,000) 0
Options expired (20,000) (40,000)
Options outstanding, end of year 5,169,200 2,175,000
2003 Stock Option and Appreciation Rights Plan [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Options outstanding, beginning of year 1,170,000 1,210,000
Options forfeited (115,000) 0
Options exercised (40,000) 0
Options expired (20,000) (40,000)
Options outstanding, end of year 995,000 1,170,000