XML 47 R35.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Debt (Tables)
 12 Months Ended
Dec. 31, 2019
Debt Disclosure [Abstract]  
Summary of convertible notes
The following table sets forth total interest expense recognized related to the 2026 Convertible Notes:
 
 
Year ended
December 31,
 
 
2019
Contractual interest expense
 
$
1,220

Amortization of debt issuance costs
 
140

Amortization of debt discount
 
$
3,659

Total
 
$
5,019

Effective interest rate of the liability component
 
10.2
%

he 2026 Convertible Notes consist of the following:
Liability component
 
December 31, 2019
Principal
 
$
287,500

Less: Debt issuance costs
 
(4,567
)
Less: Debt discount, net(1)
 
(119,350
)
Net carrying amount
 
$
163,583

(1) Included in the consolidated balance sheets within convertible senior notes (due 2026) and amortized to interest expense over the remaining life of the 2026 Convertible Notes using the effective interest rate method.
The 2022 Convertible Notes consist of the following:
 
 
Year ended
December 31,
Liability component
 
2019
 
2018
Principal
 
$
150,000

 
$
150,000

Less: Debt issuance costs
 
(1,329
)
 
(1,746
)
Less: Debt discount, net (1)
 
(26,686
)
 
(35,054
)
Net carrying amount
 
$
121,985

 
$
113,200

(1)
Included in the consolidated balance sheets within convertible senior notes (due 2022) and amortized to interest expense over the remaining life of the 2022 Convertible Notes using the effective interest rate method.
Summary of interest expense recognized related to the Convertible Notes
The following table sets forth total interest expense recognized related to the 2022 Convertible Notes:
 
 
Year ended
December 31,
 
 
2019
 
2018
Contractual interest expense
 
$
4,500

 
$
4,500

Amortization of debt issuance costs
 
417

 
375

Amortization of debt discount
 
8,368

 
7,518

Total
 
$
13,285

 
$
12,393

Effective interest rate of the liability component
 
11.0
%
 
11.0
%