Annual report pursuant to Section 13 and 15(d)

SIGNIFICANT ACCOUNTING POLICIES Remaining Performance Obligation (Details)

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SIGNIFICANT ACCOUNTING POLICIES Remaining Performance Obligation (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Revenue, remaining performance obligation   $ 26.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Revenue, remaining performance obligation $ 43.9