Commitments and Contingencies - Other Commitments (Details) - Supply Commitment [Member] $ in Thousands	Sep. 30, 2017 USD ($)
Other Commitments [Line Items]
Future Minimum Payment	$ 4,242
April 2016 [Member]
Other Commitments [Line Items]
Future Minimum Payment	1,693
April 2017 [Member]
Other Commitments [Line Items]
Future Minimum Payment	2,180
July 2017 [Member]
Other Commitments [Line Items]
Future Minimum Payment	$ 369