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Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2019

Convertible Notes

Schedule of components of convertible notes

The components of the convertible notes were as follows (in thousands):

​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	Carrying Amount					​
​	​	Interest Rates	​	​	​	December 31,					​
Debt		December 31, 2019		Maturities		2019			2018
1.25% Convertible Senior Notes due 2020	​	1.25	%	2020	​	$	18,300	​	$	17,434	​

Schedule of carrying amount and fair value of convertible notes

The carrying amount and fair value of our convertible notes were as follows (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31,

​

​

​

2019

​

2018

​

​

Carrying

​

​

Carrying

​

​

​

​

Amount

​

Fair Value

​

Amount

​

Fair Value

​

1.25% Convertible Senior Notes due 2020

​

$

18,300

​

$

32,511

​

$

17,434

​

$

25,073

​

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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.

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