Commitments and Contingencies (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016
Other Commitments [Line Items]
Total		$ 30,775
2017		1,254
2018		1,254
2019		1,416
2020		1,471
2021		23,542
2022 and thereafter		$ 1,838
Convertible Debt
Other Commitments [Line Items]
Period after product candidate FCX-007 is approved to reach maturity date	180 days	180 days
Operating lease obligations
Other Commitments [Line Items]
Total		$ 8,704
2017		1,254
2018		1,254
2019		1,416
2020		1,471
2021		1,471
2022 and thereafter		1,838
Debt obligations
Other Commitments [Line Items]
Total		22,071
2017		0
2018		0
2019		0
2020		0
2021		22,071
2022 and thereafter		$ 0