Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Commitments (Details)

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Commitments and Contingencies - Commitments (Details) - USD ($)
$ in Millions
3 Months Ended
Jul. 27, 2017
Mar. 31, 2017
Mar. 31, 2016
Sep. 30, 2016
Jul. 27, 2016
Commitments and Contingencies Disclosure [Abstract]          
Rent expense   $ 1.8 $ 1.1    
Emerging Markets Communications LLC          
Long-term Commitment [Line Items]          
Additional consideration         $ 25.0
Subsequent Event | Emerging Markets Communications LLC          
Long-term Commitment [Line Items]          
Common stock issued for acquisition (in shares) 5,080,049        
Line of Credit          
Long-term Commitment [Line Items]          
Letters of credit outstanding   4.2      
Line of Credit | Letters of Credit          
Long-term Commitment [Line Items]          
Letters of credit outstanding   $ 3.4      
Intelsat Corporation          
Long-term Commitment [Line Items]          
Other commitment       $ 40.0