XML 47 R24.htm IDEA: XBRL DOCUMENT
v3.22.4

Leases (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Leases [Abstract] |
Components of Lease Expense | The components of lease expense were as follows (in thousands):
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |
Operating lease expense |  | $ | 11,220 |  |  | $ | 2,581 |
Variable lease expense (1) |  |  | 462 |  |  |  | 302 |
Short-term lease expense |  |  | 45 |  |  |  | 92 |
Total lease expense |  | $ | 11,727 |  |  | $ | 2,975 |
(1) Variable lease expense for the periods presented primarily included common area maintenance charges.
Schedule of Supplemental Information related to Operating Leases | Supplemental information related to operating leases were as follows (in thousands):
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |
Cash paid for amounts included in the measurement of lease liabilities |  |  |  |  |  |
Operating cash flows used for operating leases |  | $ | 6,887 |  |  | $ | 2,239 |
Schedule of Maturities of Operating Lease Liabilities | Maturities of operating lease liabilities under existing operating leases as of December 31, 2022 were as follows (in thousands):
Year ending December 31, |  | Amount |
2023 |  | $ | 11,206 |
2024 |  |  | 12,671 |
2025 |  |  | 13,033 |
2026 |  |  | 13,467 |
2027 |  |  | 13,917 |
2028 and thereafter |  |  | 87,290 |
Total undiscounted future minimum lease payments |  |  | 151,584 |
Less imputed interest |  |  | (60,813 | )
Less tenant improvement receivable |  |  | (7,837 | )
Total operating lease liabilities |  | $ | 82,934 |
Operating lease liabilities: |  |  |
Current |  |  | 4,249 |
Non-current |  |  | 78,685 |
Total lease liability |  | $ | 82,934 |

X
- Definition Schedule of supplemental information related to operating leases. + References No definition available. + Details
Name: | nktx_ScheduleOfSupplementalInformationRelatedToOperatingLeasesTableTextBlock
Namespace Prefix: | nktx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
Name: | us-gaap_LeaseCostTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration