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| 0000086115-17-000053-index.html | 2017-04-27 13:40:24 | |
| 0000086115-17-000053.txt | 2017-04-27 13:40:24 | |
 0000086115-17-000053-xbrl.zip | 110361 | 2017-04-27 13:40:24 |
| FilingSummary.xml | 25721 | 2017-04-27 13:40:24 |
| Financial_Report.xlsx | 46635 | 2017-04-27 13:40:24 |
| R1.htm | 21984 | 2017-04-27 13:40:24 |
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| R9.htm | 26657 | 2017-04-27 13:40:24 |
| report.css | 2767 | 2017-04-27 13:40:24 |
| sfe-20170331.xml | 521640 | 2017-04-27 13:40:24 |
| sfe-20170331.xsd | 38490 | 2017-04-27 13:40:24 |
| sfe-20170331_cal.xml | 46948 | 2017-04-27 13:40:24 |
| sfe-20170331_def.xml | 146335 | 2017-04-27 13:40:24 |
| sfe-20170331_lab.xml | 426754 | 2017-04-27 13:40:24 |
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| sfe-2017xq1.htm | 586558 | 2017-04-27 13:40:24 |
| sfe-2017xq1xex311.htm | 22947 | 2017-04-27 13:40:24 |
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| sfe-2017xq1xex321.htm | 8941 | 2017-04-27 13:40:24 |
| sfe-2017xq1xex322.htm | 8968 | 2017-04-27 13:40:24 |
| Show.js | 1410 | 2017-04-27 13:40:24 |