Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001029744-20-000014-index-headers.html | 2020-02-13 16:35:46 | |
| 0001029744-20-000014-index.html | 2020-02-13 16:35:46 | |
| 0001029744-20-000014.txt | 2020-02-13 16:35:46 | |
 0001029744-20-000014-xbrl.zip | 194813 | 2020-02-13 16:35:46 |
| FilingSummary.xml | 30325 | 2020-02-13 16:35:46 |
| Financial_Report.xlsx | 69492 | 2020-02-13 16:35:46 |
| notemodificationagreement.htm | 21665 | 2020-02-13 16:35:46 |
| R1.htm | 25894 | 2020-02-13 16:35:46 |
| R10.htm | 76662 | 2020-02-13 16:35:46 |
| R11.htm | 39707 | 2020-02-13 16:35:46 |
| R12.htm | 6188 | 2020-02-13 16:35:46 |
| R13.htm | 98700 | 2020-02-13 16:35:46 |
| R14.htm | 5434 | 2020-02-13 16:35:46 |
| R15.htm | 49986 | 2020-02-13 16:35:46 |
| R16.htm | 97420 | 2020-02-13 16:35:46 |
| R17.htm | 94974 | 2020-02-13 16:35:46 |
| R18.htm | 94260 | 2020-02-13 16:35:46 |
| R19.htm | 25724 | 2020-02-13 16:35:46 |
| R2.htm | 110789 | 2020-02-13 16:35:46 |
| R20.htm | 8789 | 2020-02-13 16:35:46 |
| R21.htm | 40113 | 2020-02-13 16:35:46 |
| R22.htm | 7091 | 2020-02-13 16:35:46 |
| R23.htm | 16681 | 2020-02-13 16:35:46 |
| R24.htm | 15429 | 2020-02-13 16:35:46 |
| R25.htm | 38356 | 2020-02-13 16:35:46 |
| R26.htm | 25337 | 2020-02-13 16:35:46 |
| R27.htm | 19237 | 2020-02-13 16:35:46 |
| R28.htm | 12367 | 2020-02-13 16:35:46 |
| R29.htm | 10040 | 2020-02-13 16:35:46 |
| R3.htm | 64190 | 2020-02-13 16:35:46 |
| R30.htm | 61382 | 2020-02-13 16:35:46 |
| R31.htm | 6414 | 2020-02-13 16:35:46 |
| R32.htm | 38476 | 2020-02-13 16:35:46 |
| R33.htm | 19834 | 2020-02-13 16:35:46 |
| R34.htm | 22730 | 2020-02-13 16:35:46 |
| R35.htm | 12774 | 2020-02-13 16:35:46 |
| R36.htm | 217390 | 2020-02-13 16:35:46 |
| R37.htm | 6676 | 2020-02-13 16:35:46 |
| R38.htm | 70360 | 2020-02-13 16:35:46 |
| R39.htm | 39281 | 2020-02-13 16:35:46 |
| R4.htm | 31792 | 2020-02-13 16:35:46 |
| R40.htm | 39283 | 2020-02-13 16:35:46 |
| R41.htm | 32431 | 2020-02-13 16:35:46 |
| R42.htm | 18634 | 2020-02-13 16:35:46 |
| R43.htm | 6531 | 2020-02-13 16:35:46 |
| R44.htm | 16528 | 2020-02-13 16:35:46 |
| R45.htm | 8602 | 2020-02-13 16:35:46 |
| R5.htm | 11832 | 2020-02-13 16:35:46 |
| R6.htm | 26678 | 2020-02-13 16:35:46 |
| R7.htm | 91293 | 2020-02-13 16:35:46 |
| R8.htm | 124002 | 2020-02-13 16:35:46 |
| R9.htm | 16641 | 2020-02-13 16:35:46 |
| R9999.htm | 18289 | 2020-02-13 16:35:46 |
| report.css | 2767 | 2020-02-13 16:35:46 |
| Show.js | 1085 | 2020-02-13 16:35:46 |
| sofo-123119x10q.htm | 833335 | 2020-02-13 16:35:46 |
| sofo-20191231.xml | 1034851 | 2020-02-13 16:35:46 |
| sofo-20191231.xsd | 44802 | 2020-02-13 16:35:46 |
| sofo-20191231_cal.xml | 85546 | 2020-02-13 16:35:46 |
| sofo-20191231_def.xml | 309457 | 2020-02-13 16:35:46 |
| sofo-20191231_lab.xml | 644058 | 2020-02-13 16:35:46 |
| sofo-20191231_pre.xml | 440837 | 2020-02-13 16:35:46 |
| sofo123119exhibit311.htm | 12755 | 2020-02-13 16:35:46 |
| sofo123119exhibit312.htm | 12548 | 2020-02-13 16:35:46 |
| sofo123119exhibit32.htm | 10285 | 2020-02-13 16:35:46 |