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| 0001029744-17-000016-index.html | 2017-02-09 16:14:56 | |
| 0001029744-17-000016.txt | 2017-02-09 16:14:56 | |
 0001029744-17-000016-xbrl.zip | 121765 | 2017-02-09 16:14:56 |
| ex1028.htm | 75563 | 2017-02-09 16:14:56 |
| FilingSummary.xml | 20204 | 2017-02-09 16:14:56 |
| Financial_Report.xlsx | 47833 | 2017-02-09 16:14:56 |
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| R10.htm | 31188 | 2017-02-09 16:14:56 |
| R11.htm | 7053 | 2017-02-09 16:14:56 |
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| R26.htm | 51267 | 2017-02-09 16:14:56 |
| R27.htm | 78133 | 2017-02-09 16:14:56 |
| R28.htm | 18866 | 2017-02-09 16:14:56 |
| R29.htm | 6678 | 2017-02-09 16:14:56 |
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| R7.htm | 129657 | 2017-02-09 16:14:56 |
| R8.htm | 8262 | 2017-02-09 16:14:56 |
| R9.htm | 7841 | 2017-02-09 16:14:56 |
| report.css | 2767 | 2017-02-09 16:14:56 |
| Show.js | 1410 | 2017-02-09 16:14:56 |
| sofo-123116x10q.htm | 557986 | 2017-02-09 16:14:56 |
| sofo-20161231.xml | 453831 | 2017-02-09 16:14:56 |
| sofo-20161231.xsd | 32892 | 2017-02-09 16:14:56 |
| sofo-20161231_cal.xml | 63757 | 2017-02-09 16:14:56 |
| sofo-20161231_def.xml | 148510 | 2017-02-09 16:14:56 |
| sofo-20161231_lab.xml | 458762 | 2017-02-09 16:14:56 |
| sofo-20161231_pre.xml | 263619 | 2017-02-09 16:14:56 |
| sofo123116exhibit311.htm | 14366 | 2017-02-09 16:14:56 |
| sofo123116exhibit312.htm | 14211 | 2017-02-09 16:14:56 |
| sofo123116exhibit32.htm | 2727 | 2017-02-09 16:14:56 |