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Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)
Total
Common Stock Outstanding
Paid-In Capital
Accumulated Other Comprehensive Income
Treasury Stock
Retained Earnings [Member]
Common Stock, Shares, Outstanding | Scenario, Previously Reported [Member]   7,711,277        
Common Stock, Shares, Outstanding 7,711,277          
Common Stock, Shares, Outstanding | Accounting Standards Update 2014-09 [Member]   7,711,277        
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2014-09 [Member] $ 1,069,000         $ 1,069,000
Balance | Scenario, Previously Reported [Member] (101,893,000) $ (77,000) $ (31,465,000) $ (2,070,000) $ (28,153,000) (96,434,000)
Balance (101,893,000)          
Balance | Accounting Standards Update 2014-09 [Member] $ (102,962,000) (77,000) (31,465,000) (2,070,000) (28,153,000) (97,503,000)
Treasury Stock, Shares (3,773,128)          
Balance (Scenario, Previously Reported [Member]) at Dec. 31, 2017 $ (101,893,000) (77,000) (31,465,000) (2,070,000) (28,153,000) (96,434,000)
Balance at Dec. 31, 2017 (101,893,000)          
Balance (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2017 (102,962,000) (77,000) (31,465,000) (2,070,000) (28,153,000) (97,503,000)
Balance | Scenario, Previously Reported [Member] (101,893,000) (77,000) (31,465,000) (2,070,000) (28,153,000) (96,434,000)
Balance (101,893,000) (78,000) 32,434,000 (1,832,000) (28,403,000) (97,674,000)
Balance | Accounting Standards Update 2014-09 [Member] (102,962,000) $ (77,000) (31,465,000) (2,070,000) (28,153,000) (97,503,000)
Net income 963,000          
Net income | Accounting Standards Update 2014-09 [Member] 476,000          
Payments of Dividends (792,000)         (792,000)
Change in post retirement benefits, net of tax benefit of $34,000 (128,000)     (128,000)    
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments (301,000)          
Other Comprehensive Income Derivative Instruments Net Of Tax 191,000     191,000    
Common stock issued- net, value 1,000          
Treasury Stock, Retired, Par Value Method, Amount (250,000)       (250,000)  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   77,318        
Share-based compensation 969,000   969,000      
Balance at Jun. 30, 2018 (103,615,000) $ (78,000) 32,434,000 (1,832,000) (28,403,000) (97,674,000)
Balance (Accounting Standards Update 2014-09 [Member]) at Jun. 30, 2018 $ 593,000          
Common Stock, Shares, Outstanding 7,771,415 7,771,415        
Balance $ (103,615,000) $ (78,000) $ 32,434,000 $ (1,832,000) $ (28,403,000) $ (97,674,000)
Balance | Accounting Standards Update 2014-09 [Member] $ 593,000          
Treasury Stock, Shares (3,790,308) (17,180)