Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000103872-18-000023-index-headers.html | 2018-09-06 17:37:09 | |
| 0000103872-18-000023-index.html | 2018-09-06 17:37:09 | |
| 0000103872-18-000023.txt | 2018-09-06 17:37:09 | |
 0000103872-18-000023-xbrl.zip | 121221 | 2018-09-06 17:37:09 |
| a07292018-ex311.htm | 13461 | 2018-09-06 17:37:09 |
| a07292018-ex312.htm | 14053 | 2018-09-06 17:37:09 |
| a07292018-ex321.htm | 7452 | 2018-09-06 17:37:09 |
| a07292018-ex322.htm | 7445 | 2018-09-06 17:37:09 |
| FilingSummary.xml | 20344 | 2018-09-06 17:37:09 |
| Financial_Report.xlsx | 48160 | 2018-09-06 17:37:09 |
| R1.htm | 21965 | 2018-09-06 17:37:09 |
| R10.htm | 38459 | 2018-09-06 17:37:09 |
| R11.htm | 7252 | 2018-09-06 17:37:09 |
| R12.htm | 14388 | 2018-09-06 17:37:09 |
| R13.htm | 29552 | 2018-09-06 17:37:09 |
| R14.htm | 37240 | 2018-09-06 17:37:09 |
| R15.htm | 19593 | 2018-09-06 17:37:09 |
| R16.htm | 8171 | 2018-09-06 17:37:09 |
| R17.htm | 7588 | 2018-09-06 17:37:09 |
| R18.htm | 185099 | 2018-09-06 17:37:09 |
| R19.htm | 21116 | 2018-09-06 17:37:09 |
| R2.htm | 55047 | 2018-09-06 17:37:09 |
| R20.htm | 40019 | 2018-09-06 17:37:09 |
| R21.htm | 14787 | 2018-09-06 17:37:09 |
| R22.htm | 35798 | 2018-09-06 17:37:09 |
| R23.htm | 181757 | 2018-09-06 17:37:09 |
| R24.htm | 24366 | 2018-09-06 17:37:09 |
| R25.htm | 14693 | 2018-09-06 17:37:09 |
| R26.htm | 14596 | 2018-09-06 17:37:09 |
| R27.htm | 61577 | 2018-09-06 17:37:09 |
| R28.htm | 14670 | 2018-09-06 17:37:09 |
| R29.htm | 22185 | 2018-09-06 17:37:09 |
| R3.htm | 12388 | 2018-09-06 17:37:09 |
| R30.htm | 12728 | 2018-09-06 17:37:09 |
| R31.htm | 109805 | 2018-09-06 17:37:09 |
| R32.htm | 11481 | 2018-09-06 17:37:09 |
| R33.htm | 6241 | 2018-09-06 17:37:09 |
| R34.htm | 51853 | 2018-09-06 17:37:09 |
| R4.htm | 5477 | 2018-09-06 17:37:09 |
| R5.htm | 77411 | 2018-09-06 17:37:09 |
| R6.htm | 21600 | 2018-09-06 17:37:09 |
| R7.htm | 84281 | 2018-09-06 17:37:09 |
| R8.htm | 7515 | 2018-09-06 17:37:09 |
| R9.htm | 17543 | 2018-09-06 17:37:09 |
| report.css | 2767 | 2018-09-06 17:37:09 |
| Show.js | 1410 | 2018-09-06 17:37:09 |
| visi-07292018x10q.htm | 893713 | 2018-09-06 17:37:09 |
| visi-20180729.xml | 848020 | 2018-09-06 17:37:09 |
| visi-20180729.xsd | 29759 | 2018-09-06 17:37:09 |
| visi-20180729_cal.xml | 60144 | 2018-09-06 17:37:09 |
| visi-20180729_def.xml | 125387 | 2018-09-06 17:37:09 |
| visi-20180729_lab.xml | 418510 | 2018-09-06 17:37:09 |
| visi-20180729_pre.xml | 232476 | 2018-09-06 17:37:09 |
| voltrlsaamendmentredacte.htm | 11276 | 2018-09-06 17:37:09 |
 voltrlsaamendmentredacte001.jpg | 212767 | 2018-09-06 17:37:09 |
 voltrlsaamendmentredacte002.jpg | 224421 | 2018-09-06 17:37:09 |
 voltrlsaamendmentredacte003.jpg | 157061 | 2018-09-06 17:37:09 |
 voltrlsaamendmentredacte004.jpg | 54251 | 2018-09-06 17:37:09 |
 voltrlsaamendmentredacte005.jpg | 49175 | 2018-09-06 17:37:09 |
 voltrlsaamendmentredacte006.jpg | 46562 | 2018-09-06 17:37:09 |