SharpDevelop Reports is licensed under the LGPL (GNU Lesser General Public License). The full text of the LGPL can be found in the Download
in the file doc\license.txt.
If you don't know what the LGPL allows you to do, check out this matrix
that identifies the six major attributes found in Open Sources licenses and maps them against the ten most popular Open Source Licenses.
The short version is that as long as you do not modify the source code of SharpDevelop Reports, you are free to use it.