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Changes In Stockholders' Equity (Schedule of Changes in Stockholders' Equity) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
BALANCE     $ 52,282  
BALANCE, shares     6,979,686  
Increase related to adoption of ASU 2016-01 $ 0   $ 0  
Exercise of stock options, vesting of restricted stock units and grants of restricted shares, net of shares exchanged as payment     452  
Stock-based compensation     701  
Issuance of common stock under Employee Stock Purchase Plan     219  
Other comprehensive income, net of tax (50) $ 122 (280) $ 434
Net income 1,067 $ (72) 1,634 $ 809
BALANCE $ 54,790   $ 54,790  
BALANCE, shares 7,064,089   7,064,089  
Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
BALANCE     $ 34,080  
BALANCE, shares     6,980,000  
Increase related to adoption of ASU 2016-01 $ 0   $ 0  
Exercise of stock options, vesting of restricted stock units and grants of restricted shares, net of shares exchanged as payment     $ 452  
Exercise of stock options, vesting of restricted stock units and grants of restricted shares, net of shares exchanged as payment, shares     68,000  
Stock-based compensation     $ 701  
Issuance of common stock under Employee Stock Purchase Plan     $ 219  
Issuance of common stock under Employee Stock Purchase Plan, shares     16,000  
Other comprehensive income, net of tax     $ 0  
Net income     0  
BALANCE $ 35,452   $ 35,452  
BALANCE, shares 7,064,000   7,064,000  
Accumulated Other Comprehensive Loss [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
BALANCE     $ (1,409)  
Increase related to adoption of ASU 2016-01 $ (44)   (44)  
Exercise of stock options, vesting of restricted stock units and grants of restricted shares, net of shares exchanged as payment     0  
Stock-based compensation     0  
Issuance of common stock under Employee Stock Purchase Plan     0  
Other comprehensive income, net of tax     (280)  
Net income     0  
BALANCE (1,733)   (1,733)  
Retained Earnings [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
BALANCE     19,611  
Increase related to adoption of ASU 2016-01 44   44  
Exercise of stock options, vesting of restricted stock units and grants of restricted shares, net of shares exchanged as payment     0  
Stock-based compensation     0  
Issuance of common stock under Employee Stock Purchase Plan     0  
Other comprehensive income, net of tax     0  
Net income     1,634  
BALANCE $ 21,071   21,071  
ASU No. 2014-9 [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Decrease related to adoption of ASU 2014-09     (218)  
ASU No. 2014-9 [Member] | Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Decrease related to adoption of ASU 2014-09     0  
ASU No. 2014-9 [Member] | Accumulated Other Comprehensive Loss [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Decrease related to adoption of ASU 2014-09     0  
ASU No. 2014-9 [Member] | Retained Earnings [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Decrease related to adoption of ASU 2014-09     $ (218)