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Subsequent Events (Narrative) (Details) - Subsequent Event [Member] - USD ($)
$ / shares in Units, $ in Millions
Apr. 12, 2019
Apr. 01, 2019
Sanmark B V [Member]    
Subsequent Event [Line Items]    
Percentage of outstanding shares acquired   100.00%
Business Combination, Consideration Transferred   $ 3.4
Stock Options [Member]    
Subsequent Event [Line Items]    
Trading price   $ 3.36
Weighted-average grant-date fair value of options   $ 1.68
Vesting period   3 years
Expiration period   10 years
Performance stock units ("PSUs") [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   892,857
Weighted-average grant-date fair value of equity instruments other than options   $ 1.77
Trading price   $ 3.36
Performance stock units ("PSUs") [Member] | Fiscal Years 2019 Through 2022 [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   892,857
Performance stock units ("PSUs") [Member] | Vest upon the Company achieving annual adjusted EBITDA of $80 million    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   297,619
Adjusted Earnings Before Interest Tax Depreciation And Amortization   $ 80.0
Performance stock units ("PSUs") [Member] | Vest upon the Company achieving annual adjusted EBITDA of $110 million    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   297,619
Adjusted Earnings Before Interest Tax Depreciation And Amortization   $ 110.0
Performance stock units ("PSUs") [Member] | Vest upon the Company achieving annual adjusted EBITDA of $140 million    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   297,619
Adjusted Earnings Before Interest Tax Depreciation And Amortization   $ 140.0
Performance stock units ("PSUs") [Member] | Vest upon achieving a trading price of $5.00 per share [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   297,619
Trading price   $ 5.00
Number of consecutive trading days   20 days
Performance stock units ("PSUs") [Member] | Vest upon achieving a trading price of $9.00 per share [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   297,619
Trading price   $ 9.00
Number of consecutive trading days   20 days
Performance stock units ("PSUs") [Member] | Vest upon achieving a trading price of $14.00 per share [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   297,619
Trading price   $ 14.00
Number of consecutive trading days   20 days
Mr. Ennen [Member]    
Subsequent Event [Line Items]    
Aggregate grant-date fair value of stock awards   $ 7.2
Mr. Ennen [Member] | Stock Options [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   960,061
Exercise price of stock option to purchase one common share   $ 3.36
Mr. Ennen [Member] | Performance stock units ("PSUs") [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   1,785,714
Trading price   $ 3.36
Mr. Ennen [Member] | Restricted stock units ("RSUs") [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   297,619
Trading price   $ 3.36
Short Term Incentive Plan [Member] | Performance stock units ("PSUs") [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 2,222,570  
Weighted-average grant-date fair value of options $ 3.40  
Aggregate grant-date fair value of stock awards $ 7.6  
Service Period 1 year