SEC filings
| Filing | Description | Date Filed | Size  |
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| 10-Q | quarterly report | Nov 12, 1999 | 190.6 KB |
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| 8-K | current report | May 9, 2013 | 56.1 KB |
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| 424B3 | prospectus filed pursuant to rule 424 | Jan 28, 2004 | 155.8 KB |
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| SC 13G/A | amended statement of beneficial ownership | Feb 13, 2004 | 51.7 KB |
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| 424B3 | prospectus filed pursuant to rule 424 | Jan 27, 2004 | 158.0 KB |
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| 424B3 | prospectus filed pursuant to rule 424 | Aug 12, 2003 | 2.7 KB |
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| SC 13G/A | amended statement of beneficial ownership | May 14, 2010 | 44.8 KB |
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| 10-Q | quarterly report | Feb 10, 1998 | 202.5 KB |
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| SC 13G/A | amended statement of beneficial ownership | Feb 14, 2011 | 50.4 KB |
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| S-8 | registration statement | Mar 18, 2013 | 89.8 KB |
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| 424A | prospectus filed pursuant to rule 424 | Nov 10, 2003 | 161.6 KB |
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| 424B3 | prospectus filed pursuant to rule 424 | Dec 19, 2002 | 164.8 KB |
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| 10-Q | quarterly report | May 7, 1998 | 206.4 KB |
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| 8-K | current report | Dec 16, 2010 | 186.7 KB |
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| S-3/A | registration statement | Oct 22, 2001 | 143.2 KB |
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| 8-K | current report | Sep 13, 2006 | 80.8 KB |
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| S-3 | registration statement | Sep 22, 2003 | 170.0 KB |
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| S-1/A | registration statement | Nov 21, 1997 | 244.8 KB |
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| 8-K | current report | Jul 18, 2006 | 175.3 KB |
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| POS AM | post-effective amendment | Oct 23, 2002 | 171.0 KB |
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