Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000072207-20-000010-index-headers.html | 2020-02-12 10:57:26 | |
| 0000072207-20-000010-index.html | 2020-02-12 10:57:26 | |
| 0000072207-20-000010.txt | 2020-02-12 10:57:26 | |
 0000072207-20-000010-xbrl.zip | 1219742 | 2020-02-12 10:57:26 |
 a201910kindexprices.jpg | 62826 | 2020-02-12 10:57:26 |
 a201910kmapsafricav2a04.jpg | 119033 | 2020-02-12 10:57:26 |
 a201910kmapsemedv4a01.jpg | 89336 | 2020-02-12 10:57:26 |
 a201910kmapsusonshorev3.jpg | 145017 | 2020-02-12 10:57:26 |
 a201910kmapsworldv2.jpg | 86711 | 2020-02-12 10:57:26 |
 chart-eb44cfcd838c7027feb.jpg | 84500 | 2020-02-12 10:57:26 |
| FilingSummary.xml | 55044 | 2020-02-12 10:57:26 |
| Financial_Report.xlsx | 150213 | 2020-02-12 10:57:26 |
 image0a93.jpg | 37529 | 2020-02-12 10:57:26 |
| MetaLinks.json | 1110189 | 2020-02-12 10:57:26 |
| nbl-20191231.xsd | 105095 | 2020-02-12 10:57:26 |
| nbl-20191231x10k.htm | 5952394 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex1031.htm | 7139 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex1044.htm | 58708 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex1045.htm | 54805 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex1046.htm | 92432 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex1047.htm | 57721 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex1048.htm | 54399 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex211.htm | 88742 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex231.htm | 4183 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex232.htm | 10563 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex311.htm | 13042 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex312.htm | 13280 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex321.htm | 6820 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex322.htm | 6879 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex41.htm | 17647 | 2020-02-12 10:57:26 |
| nbl-20191231x10kxex991.htm | 76863 | 2020-02-12 10:57:26 |
| nbl-20191231x10k_htm.xml | 4875266 | 2020-02-12 10:57:26 |
| nbl-20191231_cal.xml | 204572 | 2020-02-12 10:57:26 |
| nbl-20191231_def.xml | 573649 | 2020-02-12 10:57:26 |
| nbl-20191231_lab.xml | 1438425 | 2020-02-12 10:57:26 |
| nbl-20191231_pre.xml | 846257 | 2020-02-12 10:57:26 |
 nsailetterhead.jpg | 47657 | 2020-02-12 10:57:26 |
 nsailogo1stpage2015v2001a03.jpg | 15924 | 2020-02-12 10:57:26 |
 nsailogo2ndpage2015v2a04.jpg | 14017 | 2020-02-12 10:57:26 |
| R1.htm | 59800 | 2020-02-12 10:57:26 |
| R10.htm | 447481 | 2020-02-12 10:57:26 |
| R11.htm | 34167 | 2020-02-12 10:57:26 |
| R12.htm | 70959 | 2020-02-12 10:57:26 |
| R13.htm | 90615 | 2020-02-12 10:57:26 |
| R14.htm | 22337 | 2020-02-12 10:57:26 |
| R15.htm | 144102 | 2020-02-12 10:57:26 |
| R16.htm | 123866 | 2020-02-12 10:57:26 |
| R17.htm | 8911 | 2020-02-12 10:57:26 |
| R18.htm | 44833 | 2020-02-12 10:57:26 |
| R19.htm | 53939 | 2020-02-12 10:57:26 |
| R2.htm | 79080 | 2020-02-12 10:57:26 |
| R20.htm | 135024 | 2020-02-12 10:57:26 |
| R21.htm | 136362 | 2020-02-12 10:57:26 |
| R22.htm | 53874 | 2020-02-12 10:57:26 |
| R23.htm | 136784 | 2020-02-12 10:57:26 |
| R24.htm | 119240 | 2020-02-12 10:57:26 |
| R25.htm | 13968 | 2020-02-12 10:57:26 |
| R26.htm | 199938 | 2020-02-12 10:57:26 |
| R27.htm | 446125 | 2020-02-12 10:57:26 |
| R28.htm | 60991 | 2020-02-12 10:57:26 |
| R29.htm | 93995 | 2020-02-12 10:57:26 |
| R3.htm | 89237 | 2020-02-12 10:57:26 |
| R30.htm | 18075 | 2020-02-12 10:57:26 |
| R31.htm | 97478 | 2020-02-12 10:57:26 |
| R32.htm | 119488 | 2020-02-12 10:57:26 |
| R33.htm | 39679 | 2020-02-12 10:57:26 |
| R34.htm | 43693 | 2020-02-12 10:57:26 |
| R35.htm | 124909 | 2020-02-12 10:57:26 |
| R36.htm | 136564 | 2020-02-12 10:57:26 |
| R37.htm | 58348 | 2020-02-12 10:57:26 |
| R38.htm | 117627 | 2020-02-12 10:57:26 |
| R39.htm | 37705 | 2020-02-12 10:57:26 |
| R4.htm | 17085 | 2020-02-12 10:57:26 |
| R40.htm | 24721 | 2020-02-12 10:57:26 |
| R41.htm | 59371 | 2020-02-12 10:57:26 |
| R42.htm | 75204 | 2020-02-12 10:57:26 |
| R43.htm | 12363 | 2020-02-12 10:57:26 |
| R44.htm | 9608 | 2020-02-12 10:57:26 |
| R45.htm | 15469 | 2020-02-12 10:57:26 |
| R46.htm | 245570 | 2020-02-12 10:57:26 |
| R47.htm | 249266 | 2020-02-12 10:57:26 |
| R48.htm | 28748 | 2020-02-12 10:57:26 |
| R49.htm | 79398 | 2020-02-12 10:57:26 |
| R5.htm | 108918 | 2020-02-12 10:57:26 |
| R50.htm | 33713 | 2020-02-12 10:57:26 |
| R51.htm | 14312 | 2020-02-12 10:57:26 |
| R52.htm | 11532 | 2020-02-12 10:57:26 |
| R53.htm | 48335 | 2020-02-12 10:57:26 |
| R54.htm | 11360 | 2020-02-12 10:57:26 |
| R55.htm | 13746 | 2020-02-12 10:57:26 |
| R56.htm | 15844 | 2020-02-12 10:57:26 |
| R57.htm | 30434 | 2020-02-12 10:57:26 |
| R58.htm | 25443 | 2020-02-12 10:57:26 |
| R59.htm | 69268 | 2020-02-12 10:57:26 |
| R6.htm | 47914 | 2020-02-12 10:57:26 |
| R60.htm | 17197 | 2020-02-12 10:57:26 |
| R61.htm | 54003 | 2020-02-12 10:57:26 |
| R62.htm | 18917 | 2020-02-12 10:57:26 |
| R63.htm | 8341 | 2020-02-12 10:57:26 |
| R64.htm | 57625 | 2020-02-12 10:57:26 |
| R65.htm | 27328 | 2020-02-12 10:57:26 |
| R66.htm | 12434 | 2020-02-12 10:57:26 |
| R67.htm | 23213 | 2020-02-12 10:57:26 |
| R68.htm | 16962 | 2020-02-12 10:57:26 |
| R69.htm | 15425 | 2020-02-12 10:57:26 |
| R7.htm | 4622 | 2020-02-12 10:57:26 |
| R70.htm | 15224 | 2020-02-12 10:57:26 |
| R71.htm | 39977 | 2020-02-12 10:57:26 |
| R72.htm | 121748 | 2020-02-12 10:57:26 |
| R73.htm | 71867 | 2020-02-12 10:57:26 |
| R74.htm | 58445 | 2020-02-12 10:57:26 |
| R75.htm | 63067 | 2020-02-12 10:57:26 |
| R76.htm | 32870 | 2020-02-12 10:57:26 |
| R77.htm | 34996 | 2020-02-12 10:57:26 |
| R78.htm | 24131 | 2020-02-12 10:57:26 |
| R79.htm | 13111 | 2020-02-12 10:57:26 |
| R8.htm | 78788 | 2020-02-12 10:57:26 |
| R80.htm | 14568 | 2020-02-12 10:57:26 |
| R81.htm | 107424 | 2020-02-12 10:57:26 |
| R82.htm | 15852 | 2020-02-12 10:57:26 |
| R83.htm | 36578 | 2020-02-12 10:57:26 |
| R84.htm | 10692 | 2020-02-12 10:57:26 |
| R85.htm | 46940 | 2020-02-12 10:57:26 |
| R9.htm | 178869 | 2020-02-12 10:57:26 |
| report.css | 2767 | 2020-02-12 10:57:26 |
| Show.js | 1086 | 2020-02-12 10:57:26 |