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Shareholders' Equity (Changes In Shares Of Common Stock) (Details) - USD ($)
 1 Months Ended 12 Months Ended
Nov. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Shareholders Equity [Line Items]      
Treasury stock, beginning balance   154,617  
Shares issued, beginning balance   14,692,214 14,397,509
Common stock issued for acquisition     294,705
Common stock issued for "at-the-market" equity offering 1,363,964 1,363,964  
Stock options exercised   21,320  
Treasury stock, ending balance   131,240 154,617
Shares issued, ending balance   16,056,178 14,692,214
Common Stock [Member]      
Shareholders Equity [Line Items]      
Shares outstanding, beginning balance   14,537,597 14,190,192
Common stock issued for acquisition     294,705
Common stock issued for "at-the-market" equity offering   1,363,964  
Restricted stock awards issued   8,898 8,800
Restricted stock awards forfeited   (10,359) (10,183)
Stock options exercised   21,320 49,761
Stock awards   $ 7,841 $ 4,322
Treasury stock purchases   (4,323)  
Shares outstanding, ending balance   15,924,938 14,537,597
Treasury Stock [Member]      
Shareholders Equity [Line Items]      
Treasury stock, beginning balance   154,617 207,317
Restricted stock awards issued   (8,898) (8,800)
Restricted stock awards forfeited   10,359 10,183
Stock options exercised   (21,320) (49,761)
Stock awards   $ (7,841) $ (4,322)
Treasury stock purchases   4,323  
Treasury stock, ending balance   131,240 154,617