Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001628280-21-003604-index-headers.html | 2021-03-01 15:22:26 | |
| 0001628280-21-003604-index.html | 2021-03-01 15:22:26 | |
| 0001628280-21-003604.txt | 2021-03-01 15:22:26 | |
 0001628280-21-003604-xbrl.zip | 577071 | 2021-03-01 15:22:26 |
| exhibit231vrt03012021.htm | 2691 | 2021-03-01 15:22:26 |
| exhibitno1029vrt03012021.htm | 39777 | 2021-03-01 15:22:26 |
| exhibitno211vrt03012021.htm | 22659 | 2021-03-01 15:22:26 |
| exhibitno311section302-vrt.htm | 10381 | 2021-03-01 15:22:26 |
| exhibitno312section302-vrt.htm | 10384 | 2021-03-01 15:22:26 |
| exhibitno321section906-vrt.htm | 4725 | 2021-03-01 15:22:26 |
| exhibitno322section906-vrt.htm | 4700 | 2021-03-01 15:22:26 |
| exhibitno49vrt03012021.htm | 23559 | 2021-03-01 15:22:26 |
| FilingSummary.xml | 71396 | 2021-03-01 15:22:26 |
| Financial_Report.xlsx | 181217 | 2021-03-01 15:22:26 |
| MetaLinks.json | 1043808 | 2021-03-01 15:22:26 |
| R1.htm | 63147 | 2021-03-01 15:22:26 |
| R10.htm | 79340 | 2021-03-01 15:22:26 |
| R100.htm | 36305 | 2021-03-01 15:22:26 |
| R101.htm | 34158 | 2021-03-01 15:22:26 |
| R102.htm | 15371 | 2021-03-01 15:22:26 |
| R103.htm | 15085 | 2021-03-01 15:22:26 |
| R104.htm | 14836 | 2021-03-01 15:22:26 |
| R105.htm | 28772 | 2021-03-01 15:22:26 |
| R106.htm | 24089 | 2021-03-01 15:22:26 |
| R107.htm | 10036 | 2021-03-01 15:22:26 |
| R108.htm | 17341 | 2021-03-01 15:22:26 |
| R109.htm | 14876 | 2021-03-01 15:22:26 |
| R11.htm | 47223 | 2021-03-01 15:22:26 |
| R110.htm | 31459 | 2021-03-01 15:22:26 |
| R111.htm | 13180 | 2021-03-01 15:22:26 |
| R112.htm | 25061 | 2021-03-01 15:22:26 |
| R113.htm | 35922 | 2021-03-01 15:22:26 |
| R114.htm | 16038 | 2021-03-01 15:22:26 |
| R115.htm | 36985 | 2021-03-01 15:22:26 |
| R116.htm | 63339 | 2021-03-01 15:22:26 |
| R12.htm | 61531 | 2021-03-01 15:22:26 |
| R13.htm | 51409 | 2021-03-01 15:22:26 |
| R14.htm | 36931 | 2021-03-01 15:22:26 |
| R15.htm | 130087 | 2021-03-01 15:22:26 |
| R16.htm | 106263 | 2021-03-01 15:22:26 |
| R17.htm | 50624 | 2021-03-01 15:22:26 |
| R18.htm | 9242 | 2021-03-01 15:22:26 |
| R19.htm | 45743 | 2021-03-01 15:22:26 |
| R2.htm | 48567 | 2021-03-01 15:22:26 |
| R20.htm | 17730 | 2021-03-01 15:22:26 |
| R21.htm | 27992 | 2021-03-01 15:22:26 |
| R22.htm | 94896 | 2021-03-01 15:22:26 |
| R23.htm | 33931 | 2021-03-01 15:22:26 |
| R24.htm | 21896 | 2021-03-01 15:22:26 |
| R25.htm | 9241 | 2021-03-01 15:22:26 |
| R26.htm | 82514 | 2021-03-01 15:22:26 |
| R27.htm | 69270 | 2021-03-01 15:22:26 |
| R28.htm | 45801 | 2021-03-01 15:22:26 |
| R29.htm | 76149 | 2021-03-01 15:22:26 |
| R3.htm | 21793 | 2021-03-01 15:22:26 |
| R30.htm | 48231 | 2021-03-01 15:22:26 |
| R31.htm | 94842 | 2021-03-01 15:22:26 |
| R32.htm | 29251 | 2021-03-01 15:22:26 |
| R33.htm | 38358 | 2021-03-01 15:22:26 |
| R34.htm | 136044 | 2021-03-01 15:22:26 |
| R35.htm | 107683 | 2021-03-01 15:22:26 |
| R36.htm | 57454 | 2021-03-01 15:22:26 |
| R37.htm | 37019 | 2021-03-01 15:22:26 |
| R38.htm | 17114 | 2021-03-01 15:22:26 |
| R39.htm | 27834 | 2021-03-01 15:22:26 |
| R4.htm | 75454 | 2021-03-01 15:22:26 |
| R40.htm | 90748 | 2021-03-01 15:22:26 |
| R41.htm | 31020 | 2021-03-01 15:22:26 |
| R42.htm | 19759 | 2021-03-01 15:22:26 |
| R43.htm | 82521 | 2021-03-01 15:22:26 |
| R44.htm | 41431 | 2021-03-01 15:22:26 |
| R45.htm | 12197 | 2021-03-01 15:22:26 |
| R46.htm | 12123 | 2021-03-01 15:22:26 |
| R47.htm | 12154 | 2021-03-01 15:22:26 |
| R48.htm | 18874 | 2021-03-01 15:22:26 |
| R49.htm | 5118 | 2021-03-01 15:22:26 |
| R5.htm | 119143 | 2021-03-01 15:22:26 |
| R50.htm | 10160 | 2021-03-01 15:22:26 |
| R51.htm | 9165 | 2021-03-01 15:22:26 |
| R52.htm | 7122 | 2021-03-01 15:22:26 |
| R53.htm | 73528 | 2021-03-01 15:22:26 |
| R54.htm | 9191 | 2021-03-01 15:22:26 |
| R55.htm | 13450 | 2021-03-01 15:22:26 |
| R56.htm | 15324 | 2021-03-01 15:22:26 |
| R57.htm | 17298 | 2021-03-01 15:22:26 |
| R58.htm | 15329 | 2021-03-01 15:22:26 |
| R59.htm | 15116 | 2021-03-01 15:22:26 |
| R6.htm | 52982 | 2021-03-01 15:22:26 |
| R60.htm | 28527 | 2021-03-01 15:22:26 |
| R61.htm | 14964 | 2021-03-01 15:22:26 |
| R62.htm | 13378 | 2021-03-01 15:22:26 |
| R63.htm | 38048 | 2021-03-01 15:22:26 |
| R64.htm | 22739 | 2021-03-01 15:22:26 |
| R65.htm | 27557 | 2021-03-01 15:22:26 |
| R66.htm | 42094 | 2021-03-01 15:22:26 |
| R67.htm | 51608 | 2021-03-01 15:22:26 |
| R68.htm | 10133 | 2021-03-01 15:22:26 |
| R69.htm | 20581 | 2021-03-01 15:22:26 |
| R7.htm | 21829 | 2021-03-01 15:22:26 |
| R70.htm | 7162 | 2021-03-01 15:22:26 |
| R71.htm | 16544 | 2021-03-01 15:22:26 |
| R72.htm | 16545 | 2021-03-01 15:22:26 |
| R73.htm | 6971 | 2021-03-01 15:22:26 |
| R74.htm | 20118 | 2021-03-01 15:22:26 |
| R75.htm | 40708 | 2021-03-01 15:22:26 |
| R76.htm | 22363 | 2021-03-01 15:22:26 |
| R77.htm | 61414 | 2021-03-01 15:22:26 |
| R78.htm | 10542 | 2021-03-01 15:22:26 |
| R79.htm | 20371 | 2021-03-01 15:22:26 |
| R8.htm | 5214 | 2021-03-01 15:22:26 |
| R80.htm | 16805 | 2021-03-01 15:22:26 |
| R81.htm | 51248 | 2021-03-01 15:22:26 |
| R82.htm | 15802 | 2021-03-01 15:22:26 |
| R83.htm | 39923 | 2021-03-01 15:22:26 |
| R84.htm | 12171 | 2021-03-01 15:22:26 |
| R85.htm | 25466 | 2021-03-01 15:22:26 |
| R86.htm | 51881 | 2021-03-01 15:22:26 |
| R87.htm | 54869 | 2021-03-01 15:22:26 |
| R88.htm | 16253 | 2021-03-01 15:22:26 |
| R89.htm | 13706 | 2021-03-01 15:22:26 |
| R9.htm | 74166 | 2021-03-01 15:22:26 |
| R90.htm | 24272 | 2021-03-01 15:22:26 |
| R91.htm | 17957 | 2021-03-01 15:22:26 |
| R92.htm | 28213 | 2021-03-01 15:22:26 |
| R93.htm | 13637 | 2021-03-01 15:22:26 |
| R94.htm | 26602 | 2021-03-01 15:22:26 |
| R95.htm | 9840 | 2021-03-01 15:22:26 |
| R96.htm | 18804 | 2021-03-01 15:22:26 |
| R97.htm | 52701 | 2021-03-01 15:22:26 |
| R98.htm | 21122 | 2021-03-01 15:22:26 |
| R99.htm | 28787 | 2021-03-01 15:22:26 |
| R9999.htm | 7334 | 2021-03-01 15:22:26 |
| report.css | 2768 | 2021-03-01 15:22:26 |
| Show.js | 1086 | 2021-03-01 15:22:26 |
| vrt-20201231.htm | 3145621 | 2021-03-01 15:22:26 |
| vrt-20201231.xsd | 85342 | 2021-03-01 15:22:26 |
| vrt-20201231_cal.xml | 165719 | 2021-03-01 15:22:26 |
| vrt-20201231_def.xml | 604617 | 2021-03-01 15:22:26 |
 vrt-20201231_g1.jpg | 34979 | 2021-03-01 15:22:26 |
| vrt-20201231_htm.xml | 3284275 | 2021-03-01 15:22:26 |
| vrt-20201231_lab.xml | 1078249 | 2021-03-01 15:22:26 |
| vrt-20201231_pre.xml | 850386 | 2021-03-01 15:22:26 |