XML 45 R31.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Convertible Senior Notes (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Convertible Senior Notes |
Schedule of interest expense relating to the Convertible Notes | Interest expense relating to the Convertible Notes in the consolidated statements of operations for the year ended December 31, 2021 are summarized as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended | ​ | Year ended
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Contractual interest expense | ​ | $ | 7,906 | ​ | $ | 4,370
Amortization of debt discount | ​ | ​ | - | ​ | ​ | 5,610
Amortization of debt issuance costs | ​ | ​ | 1,373 | ​ | ​ | 364
Total interest expense | ​ | $ | 9,279 | ​ | $ | 10,344
Schedule of convertible senior notes | As of December 31, 2021, the convertible senior notes on the consolidated balance sheets represented the carrying amount of the liability component of the Convertible Notes, net of unamortized debt issuance costs, which are summarized as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended | ​ | Year ended
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Convertible Notes | ​ | $ | 287,500 | ​ | ​ | 287,500
Less: Unamortized debt discount | ​ | ​ | - | ​ | ​ | (92,102)
Less: Unamortized debt issuance costs | ​ | ​ | (7,474) | ​ | ​ | (5,982)
Carrying amount of Convertible Notes | ​ | $ | 280,026 | ​ | ​ | 189,416

X
- Definition Tabular disclosure for interest expense relating to the Convertible Notes. + References No definition available. + Details
Name: | gkos_ScheduleOfInterestExpenseOnConvertibleNotesTableTextBlock
Namespace Prefix: | gkos_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of convertible debt instrument. Includes, but is not limited to, principal amount and amortized premium or discount. + References No definition available. + Details
Name: | us-gaap_ConvertibleDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration