Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule Of Future Minimum Lease Payments For Operating And Capital Leases [Table Text Block]

The following table presents future minimum lease payments under operating and capital leases as of December 31, 2017 were as follows (in thousands):

	Operating		Capital
2018	$	4,218	$	1,024
2019		4,252		574
2020		4,379		269
2021		4,511		2
2022		4,646		—
Thereafter		13,374		—
Total minimum lease payments	$	35,380	$	1,869
Less: Portion representing interest				(188	)
Present value of capital lease obligations				1,681
Less: Current portion of capital lease obligations				(936	)
Capital lease obligations net of current portion			$	745