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Retirement Plans (Details) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2013
Retirement Plans [Abstract]            
Service cost   $ 0 $ 1,000 $ 0 $ 2,000  
Interest cost   43,000 47,000 86,000 93,000  
Expected return on plan assets   (15,000) (18,000) (30,000) (36,000)  
Amortization of net loss   4,000 2,000 9,000 4,000  
Net periodic benefit cost   32,000 32,000 65,000 63,000  
German Subsidiary Defined Benefit Plan [Member]
           
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]            
Employer contributions   6,000 9,000 13,000 17,000  
United States Defined Contribution Plan [Member]
           
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]            
Employer contributions   82,000 39,000 180,000 82,000  
Employer matching contribution (in hundredths) 50.00%         25.00%
Employee contribution subject to employer match (in hundredths) 5.00%         5.00%
United Kingdom Defined Contribution Plan [Member]
           
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]            
Employer contributions   $ 18,000 $ 14,000 $ 35,000 $ 30,000  
Employee contribution subject to employer match (in hundredths)       100.00%    
Minimum [Member] | United Kingdom Defined Contribution Plan [Member]
           
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]            
Employer matching contribution (in hundredths)       4.00%    
Maximum [Member] | United Kingdom Defined Contribution Plan [Member]
           
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]            
Employer matching contribution (in hundredths)       7.00%