Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Summary of contractual obligations

The following table is a summary of contractual obligations for the periods indicated that existed as of December 31, 2016.

($ in thousands)	Total		Less than 1 Year		1-3 Years		3-5 Years		More than 5 years
Long term debt obligations(1)	$	28,665	$	1,755	$	26,910	$	—	$	—
Operating leases	5,896		1,065		3,303		1,528		—
Purchase obligations—principally employment and consulting services(2)	7,285		3,561		3,724		—		—
Purchase obligations—major vendors(3)	138,619		131,381		7,238		—		—
Total obligations	$	180,465	$	137,762	$	41,175	$	1,528	$	—

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(1) Represents Senior Convertible Notes, including interest. See Note 4 to our Consolidated Financial Statements.

(2) Represents salary, bonus, and benefits for employment and consulting agreements with remaining terms greater than one year.

(3) Represents amounts that will become due upon future delivery of supplies, drug substance and test results from various suppliers, under open purchase orders. Generally these purchase orders represents commitments to suppliers with cancellation provisions that allow early termination with notice, penalties and payment of certain non-cancelable vendor commitments.