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| 0001410578-23-000504-index.html | 2023-03-31 08:57:53 | |
| 0001410578-23-000504.txt | 2023-03-31 08:57:53 | |
 0001410578-23-000504-xbrl.zip | 257058 | 2023-03-31 08:57:53 |
| FilingSummary.xml | 35532 | 2023-03-31 08:57:53 |
| Financial_Report.xlsx | 85634 | 2023-03-31 08:57:53 |
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| R1.htm | 66031 | 2023-03-31 08:57:53 |
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| R8.htm | 21266 | 2023-03-31 08:57:53 |
| R9.htm | 24320 | 2023-03-31 08:57:53 |
| report.css | 2767 | 2023-03-31 08:57:53 |
| Show.js | 1085 | 2023-03-31 08:57:53 |
| svt-20221231.xsd | 46480 | 2023-03-31 08:57:53 |
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 svt-20221231x10k002.jpg | 11912 | 2023-03-31 08:57:53 |
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| svt-20221231xex24.htm | 4090 | 2023-03-31 08:57:53 |
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| svt-20221231xex4d4.htm | 17610 | 2023-03-31 08:57:53 |
| svt-20221231_cal.xml | 68826 | 2023-03-31 08:57:53 |
| svt-20221231_def.xml | 180292 | 2023-03-31 08:57:53 |
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| svt-20221231_pre.xml | 350729 | 2023-03-31 08:57:53 |