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|---|---|---|
 0001104659-26-025284-index-headers.html | 2026-03-09 16:38:39 | |
| 0001104659-26-025284-index.html | 2026-03-09 16:38:39 | |
| 0001104659-26-025284.txt | 2026-03-09 16:38:39 | |
 0001104659-26-025284-xbrl.zip | 379261 | 2026-03-09 16:38:39 |
| FilingSummary.xml | 40864 | 2026-03-09 16:38:39 |
| fsp-20251231.xsd | 69689 | 2026-03-09 16:38:39 |
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 fsp-20251231x10k006.jpg | 65578 | 2026-03-09 16:38:39 |
| fsp-20251231x10k_htm.xml | 2028523 | 2026-03-09 16:38:39 |
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| fsp-20251231xex31d1.htm | 15410 | 2026-03-09 16:38:39 |
| fsp-20251231xex31d2.htm | 15460 | 2026-03-09 16:38:39 |
| fsp-20251231xex32d1.htm | 6412 | 2026-03-09 16:38:39 |
| fsp-20251231xex32d2.htm | 6472 | 2026-03-09 16:38:39 |
| fsp-20251231_cal.xml | 73036 | 2026-03-09 16:38:39 |
| fsp-20251231_def.xml | 245361 | 2026-03-09 16:38:39 |
| fsp-20251231_lab.xml | 635211 | 2026-03-09 16:38:39 |
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| R1.htm | 70858 | 2026-03-09 16:38:39 |
| R10.htm | 29126 | 2026-03-09 16:38:39 |
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| R20.htm | 59663 | 2026-03-09 16:38:39 |
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| R22.htm | 8465 | 2026-03-09 16:38:39 |
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| R31.htm | 98721 | 2026-03-09 16:38:39 |
| R32.htm | 26751 | 2026-03-09 16:38:39 |
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| R9.htm | 156246 | 2026-03-09 16:38:39 |
| report.css | 2767 | 2026-03-09 16:38:39 |
| Show.js | 1085 | 2026-03-09 16:38:39 |