Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-21-000980-index-headers.html | 2021-08-06 07:34:08 | |
| 0000950170-21-000980-index.html | 2021-08-06 07:34:08 | |
| 0000950170-21-000980.txt | 2021-08-06 07:34:08 | |
 0000950170-21-000980-xbrl.zip | 289551 | 2021-08-06 07:34:08 |
| alvr-20210630.htm | 2381434 | 2021-08-06 07:34:08 |
| alvr-20210630.xsd | 51537 | 2021-08-06 07:34:08 |
| alvr-20210630ex10_1.htm | 21568 | 2021-08-06 07:34:08 |
| alvr-20210630ex10_2.htm | 218406 | 2021-08-06 07:34:08 |
| alvr-20210630ex31_1.htm | 15271 | 2021-08-06 07:34:08 |
| alvr-20210630ex31_2.htm | 15306 | 2021-08-06 07:34:08 |
| alvr-20210630ex32_1.htm | 9526 | 2021-08-06 07:34:08 |
| alvr-20210630ex32_2.htm | 9564 | 2021-08-06 07:34:08 |
| alvr-20210630_cal.xml | 34737 | 2021-08-06 07:34:08 |
| alvr-20210630_def.xml | 152345 | 2021-08-06 07:34:08 |
| alvr-20210630_htm.xml | 1208165 | 2021-08-06 07:34:08 |
| alvr-20210630_lab.xml | 413928 | 2021-08-06 07:34:08 |
| alvr-20210630_pre.xml | 289404 | 2021-08-06 07:34:08 |
| FilingSummary.xml | 31946 | 2021-08-06 07:34:08 |
| Financial_Report.xlsx | 73211 | 2021-08-06 07:34:08 |
 img239497725_0.jpg | 18836 | 2021-08-06 07:34:08 |
| MetaLinks.json | 543658 | 2021-08-06 07:34:08 |
| R1.htm | 55608 | 2021-08-06 07:34:08 |
| R10.htm | 103538 | 2021-08-06 07:34:08 |
| R11.htm | 48030 | 2021-08-06 07:34:08 |
| R12.htm | 25306 | 2021-08-06 07:34:08 |
| R13.htm | 30926 | 2021-08-06 07:34:08 |
| R14.htm | 8512 | 2021-08-06 07:34:08 |
| R15.htm | 28189 | 2021-08-06 07:34:08 |
| R16.htm | 138728 | 2021-08-06 07:34:08 |
| R17.htm | 8841 | 2021-08-06 07:34:08 |
| R18.htm | 70304 | 2021-08-06 07:34:08 |
| R19.htm | 12189 | 2021-08-06 07:34:08 |
| R2.htm | 73618 | 2021-08-06 07:34:08 |
| R20.htm | 21435 | 2021-08-06 07:34:08 |
| R21.htm | 48721 | 2021-08-06 07:34:08 |
| R22.htm | 100967 | 2021-08-06 07:34:08 |
| R23.htm | 21728 | 2021-08-06 07:34:08 |
| R24.htm | 24932 | 2021-08-06 07:34:08 |
| R25.htm | 21643 | 2021-08-06 07:34:08 |
| R26.htm | 128673 | 2021-08-06 07:34:08 |
| R27.htm | 71683 | 2021-08-06 07:34:08 |
| R28.htm | 41190 | 2021-08-06 07:34:08 |
| R29.htm | 23304 | 2021-08-06 07:34:08 |
| R3.htm | 18994 | 2021-08-06 07:34:08 |
| R30.htm | 14938 | 2021-08-06 07:34:08 |
| R31.htm | 20238 | 2021-08-06 07:34:08 |
| R32.htm | 67202 | 2021-08-06 07:34:08 |
| R33.htm | 18455 | 2021-08-06 07:34:08 |
| R34.htm | 8460 | 2021-08-06 07:34:08 |
| R35.htm | 14480 | 2021-08-06 07:34:08 |
| R36.htm | 77761 | 2021-08-06 07:34:08 |
| R37.htm | 11854 | 2021-08-06 07:34:08 |
| R38.htm | 29261 | 2021-08-06 07:34:08 |
| R39.htm | 11793 | 2021-08-06 07:34:08 |
| R4.htm | 48646 | 2021-08-06 07:34:08 |
| R40.htm | 59321 | 2021-08-06 07:34:08 |
| R41.htm | 24947 | 2021-08-06 07:34:08 |
| R42.htm | 30094 | 2021-08-06 07:34:08 |
| R43.htm | 11768 | 2021-08-06 07:34:08 |
| R44.htm | 10807 | 2021-08-06 07:34:08 |
| R45.htm | 9202 | 2021-08-06 07:34:08 |
| R46.htm | 11794 | 2021-08-06 07:34:08 |
| R47.htm | 18204 | 2021-08-06 07:34:08 |
| R48.htm | 12321 | 2021-08-06 07:34:08 |
| R5.htm | 62095 | 2021-08-06 07:34:08 |
| R6.htm | 62337 | 2021-08-06 07:34:08 |
| R7.htm | 28257 | 2021-08-06 07:34:08 |
| R8.htm | 15840 | 2021-08-06 07:34:08 |
| R9.htm | 50808 | 2021-08-06 07:34:08 |
| report.css | 2767 | 2021-08-06 07:34:08 |
| Show.js | 1085 | 2021-08-06 07:34:08 |