Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-23-002696-index-headers.html | 2023-02-14 07:01:54 | |
| 0000950170-23-002696-index.html | 2023-02-14 07:01:54 | |
| 0000950170-23-002696.txt | 2023-02-14 07:01:54 | |
 0000950170-23-002696-xbrl.zip | 493313 | 2023-02-14 07:01:54 |
| FilingSummary.xml | 43011 | 2023-02-14 07:01:54 |
| Financial_Report.xlsx | 174571 | 2023-02-14 07:01:54 |
 img121274776_0.jpg | 10955 | 2023-02-14 07:01:54 |
 img136617565_0.gif | 16488 | 2023-02-14 07:01:54 |
| MetaLinks.json | 1049178 | 2023-02-14 07:01:54 |
| R1.htm | 69078 | 2023-02-14 07:01:54 |
| R10.htm | 181519 | 2023-02-14 07:01:54 |
| R11.htm | 463986 | 2023-02-14 07:01:54 |
| R12.htm | 171887 | 2023-02-14 07:01:54 |
| R13.htm | 35828 | 2023-02-14 07:01:54 |
| R14.htm | 210467 | 2023-02-14 07:01:54 |
| R15.htm | 176124 | 2023-02-14 07:01:54 |
| R16.htm | 1070982 | 2023-02-14 07:01:54 |
| R17.htm | 504952 | 2023-02-14 07:01:54 |
| R18.htm | 370161 | 2023-02-14 07:01:54 |
| R19.htm | 271797 | 2023-02-14 07:01:54 |
| R2.htm | 69696 | 2023-02-14 07:01:54 |
| R20.htm | 173077 | 2023-02-14 07:01:54 |
| R21.htm | 402294 | 2023-02-14 07:01:54 |
| R22.htm | 125084 | 2023-02-14 07:01:54 |
| R23.htm | 94781 | 2023-02-14 07:01:54 |
| R24.htm | 160279 | 2023-02-14 07:01:54 |
| R25.htm | 1034641 | 2023-02-14 07:01:54 |
| R26.htm | 71115 | 2023-02-14 07:01:54 |
| R27.htm | 34925 | 2023-02-14 07:01:54 |
| R28.htm | 11897 | 2023-02-14 07:01:54 |
| R29.htm | 12767 | 2023-02-14 07:01:54 |
| R3.htm | 137424 | 2023-02-14 07:01:54 |
| R30.htm | 8031 | 2023-02-14 07:01:54 |
| R31.htm | 10833 | 2023-02-14 07:01:54 |
| R32.htm | 22795 | 2023-02-14 07:01:54 |
| R33.htm | 15048 | 2023-02-14 07:01:54 |
| R34.htm | 16286 | 2023-02-14 07:01:54 |
| R35.htm | 10896 | 2023-02-14 07:01:54 |
| R36.htm | 56456 | 2023-02-14 07:01:54 |
| R37.htm | 19593 | 2023-02-14 07:01:54 |
| R38.htm | 24641 | 2023-02-14 07:01:54 |
| R39.htm | 147783 | 2023-02-14 07:01:54 |
| R4.htm | 4634 | 2023-02-14 07:01:54 |
| R40.htm | 4352 | 2023-02-14 07:01:54 |
| R41.htm | 70141 | 2023-02-14 07:01:54 |
| R42.htm | 61583 | 2023-02-14 07:01:54 |
| R43.htm | 21121 | 2023-02-14 07:01:54 |
| R44.htm | 11691 | 2023-02-14 07:01:54 |
| R45.htm | 25199 | 2023-02-14 07:01:54 |
| R46.htm | 27711 | 2023-02-14 07:01:54 |
| R47.htm | 41521 | 2023-02-14 07:01:54 |
| R48.htm | 95848 | 2023-02-14 07:01:54 |
| R49.htm | 19374 | 2023-02-14 07:01:54 |
| R5.htm | 85586 | 2023-02-14 07:01:54 |
| R50.htm | 22424 | 2023-02-14 07:01:54 |
| R51.htm | 35187 | 2023-02-14 07:01:54 |
| R52.htm | 7044 | 2023-02-14 07:01:54 |
| R53.htm | 19906 | 2023-02-14 07:01:54 |
| R54.htm | 19202 | 2023-02-14 07:01:54 |
| R55.htm | 331469 | 2023-02-14 07:01:54 |
| R56.htm | 15192 | 2023-02-14 07:01:54 |
| R57.htm | 23464 | 2023-02-14 07:01:54 |
| R58.htm | 14306 | 2023-02-14 07:01:54 |
| R59.htm | 26768 | 2023-02-14 07:01:54 |
| R6.htm | 26762 | 2023-02-14 07:01:54 |
| R60.htm | 38092 | 2023-02-14 07:01:54 |
| R61.htm | 20267 | 2023-02-14 07:01:54 |
| R62.htm | 65391 | 2023-02-14 07:01:54 |
| R63.htm | 39961 | 2023-02-14 07:01:54 |
| R64.htm | 48814 | 2023-02-14 07:01:54 |
| R65.htm | 17891 | 2023-02-14 07:01:54 |
| R66.htm | 22548 | 2023-02-14 07:01:54 |
| R67.htm | 34884 | 2023-02-14 07:01:54 |
| R68.htm | 28000 | 2023-02-14 07:01:54 |
| R69.htm | 17902 | 2023-02-14 07:01:54 |
| R7.htm | 5899 | 2023-02-14 07:01:54 |
| R8.htm | 452017 | 2023-02-14 07:01:54 |
| R9.htm | 280231 | 2023-02-14 07:01:54 |
| report.css | 2767 | 2023-02-14 07:01:54 |
| Show.js | 1085 | 2023-02-14 07:01:54 |
| utl-20221231.htm | 6050274 | 2023-02-14 07:01:54 |
| utl-20221231.xsd | 99826 | 2023-02-14 07:01:54 |
| utl-20221231_cal.xml | 56773 | 2023-02-14 07:01:54 |
| utl-20221231_def.xml | 585344 | 2023-02-14 07:01:54 |
| utl-20221231_htm.xml | 7288679 | 2023-02-14 07:01:54 |
| utl-20221231_lab.xml | 757843 | 2023-02-14 07:01:54 |
| utl-20221231_pre.xml | 674450 | 2023-02-14 07:01:54 |
| utl-ex21_1.htm | 4026 | 2023-02-14 07:01:54 |
| utl-ex23_1.htm | 8929 | 2023-02-14 07:01:54 |
| utl-ex31_1.htm | 19139 | 2023-02-14 07:01:54 |
| utl-ex31_2.htm | 19086 | 2023-02-14 07:01:54 |
| utl-ex31_3.htm | 19271 | 2023-02-14 07:01:54 |
| utl-ex32_1.htm | 36512 | 2023-02-14 07:01:54 |
| utl-ex99_1.htm | 260422 | 2023-02-14 07:01:54 |