Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000352825-21-000011-index-headers.html | 2021-03-02 16:16:36 | |
| 0000352825-21-000011-index.html | 2021-03-02 16:16:36 | |
| 0000352825-21-000011.txt | 2021-03-02 16:16:36 | |
 0000352825-21-000011-xbrl.zip | 30786 | 2021-03-02 16:16:36 |
| ex-991q42020.htm | 245430 | 2021-03-02 16:16:36 |
| FilingSummary.xml | 1711 | 2021-03-02 16:16:36 |
| Financial_Report.xlsx | 5466 | 2021-03-02 16:16:36 |
| fstr-20210302.htm | 43186 | 2021-03-02 16:16:36 |
| fstr-20210302.xsd | 2423 | 2021-03-02 16:16:36 |
| fstr-20210302_cal.xml | 710 | 2021-03-02 16:16:36 |
| fstr-20210302_def.xml | 1643 | 2021-03-02 16:16:36 |
| fstr-20210302_htm.xml | 15735 | 2021-03-02 16:16:36 |
| fstr-20210302_lab.xml | 23970 | 2021-03-02 16:16:36 |
| fstr-20210302_pre.xml | 12646 | 2021-03-02 16:16:36 |
 image1a.jpg | 26481 | 2021-03-02 16:16:36 |
| MetaLinks.json | 17213 | 2021-03-02 16:16:36 |
| R1.htm | 39641 | 2021-03-02 16:16:36 |
| report.css | 2767 | 2021-03-02 16:16:36 |
| Show.js | 1085 | 2021-03-02 16:16:36 |