Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2016
Effective tax rate	33.40%	25.90%
Retroactive reinstatement of research tax credit, benefit	$ 1.7
Foreign Tax Authority [Member] | France [Member]
Current period tax expense	$ 1.7
Federal statutory income tax rate	28.00%		33.30%