Senior convertible notes (Tables)

12 Months Ended

Dec. 31, 2015

Senior convertible notes consist of the following (in thousands):


	December 31,
	2015			2014
2015 notes
Principal amount	$	—		$	100,000
Unaccreted debt issuance cost		—			(645	)

Net carrying amount	$	—		$	99,355

2018 notes
Principal amount	$	27,690		$	—
Unamortized premium		660			—
Unaccreted debt issuance costs		(737	)		—

Net carrying amount	$	27,613		$	—

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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+ Details