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   &lt;!-- Begin Block Tagged Note 2 - us-gaap:CashCashEquivalentsAndShortTermInvestmentsTextBlock--&gt;
   &lt;p style="margin-top:0px;margin-bottom:0px"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&lt;b&gt;2. Cash and Investments &lt;/b&gt;&lt;/font&gt;&lt;/p&gt;
   &lt;p style="margin-top:6px;margin-bottom:0px; text-indent:4%"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Cash, cash equivalents, short-term investments, and
   restricted cash consisted of the following at June&amp;#160;30, 2013 and December&amp;#160;31, 2012 (in thousands): &lt;/font&gt;&lt;/p&gt;
   &lt;p style="font-size:12px;margin-top:0px;margin-bottom:0px"&gt;&amp;#160;&lt;/p&gt;
   &lt;table cellspacing="0" cellpadding="0" width="76%" border="0" style="border-collapse:collapse; text-align: left" align="center"&gt;
   &lt;!-- Begin Table Head --&gt;
   &lt;tr&gt;
   &lt;td width="76%"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom" width="6%"&gt;&amp;#160;&lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom" width="6%"&gt;&amp;#160;&lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000"&gt;&lt;font style="font-family:times new roman" size="1"&gt;&lt;b&gt;June&amp;#160;30,&lt;br /&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000"&gt;&lt;font style="font-family:times new roman" size="1"&gt;&lt;b&gt;December&amp;#160;31,&lt;br /&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;!-- End Table Head --&gt;
   &lt;!-- Begin Table Body --&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Cash&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;1,994&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;2,590&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Cash equivalents:&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:3.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Money market funds&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;8,777&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;7,313&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr style="font-size:1px"&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Total cash equivalents&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;8,777&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;7,313&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr style="font-size:1px"&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Total cash and cash equivalents&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;10,771&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;9,903&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Short-term investments:&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:3.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Municipal securities&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#8212;&amp;#160;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;356&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:3.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Corporate commercial paper&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;1,250&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;4,374&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:3.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Foreign government bonds&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;1,001&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;999&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:3.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Corporate debt securities&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;7,080&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;4,097&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr style="font-size:1px"&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Total short-term investments&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;9,331&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;9,826&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Restricted cash&amp;#8212;money market fund&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;875&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;875&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr style="font-size:1px"&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:1px solid #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr bgcolor="#cceeff"&gt;
   &lt;td valign="top"&gt;
   &lt;p style="margin-left:1.00em; text-indent:-1.00em"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Total cash, cash equivalents, investments and restricted cash&lt;/font&gt;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;20,977&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
   &lt;td valign="bottom" align="right"&gt;&lt;font style="font-family:times new roman" size="2"&gt;20,604&lt;/font&gt;&lt;/td&gt;
   &lt;td nowrap="nowrap" valign="bottom"&gt;&lt;font style="font-family:times new roman" size="2"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr style="font-size:1px"&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:3px double #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:3px double #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;&amp;#160;&lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:3px double #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td valign="bottom"&gt;
   &lt;p style="border-top:3px double #000000"&gt;&amp;#160;&lt;/p&gt;
   &lt;/td&gt;
   &lt;td&gt;&amp;#160;&lt;/td&gt;
   &lt;/tr&gt;
   &lt;!-- End Table Body --&gt;
   &lt;/table&gt;
   &lt;p style="margin-top:12px;margin-bottom:0px; text-indent:4%"&gt;&lt;font style="font-family:times new roman" size="2"&gt;Gross unrealized gains and losses on our short-term investments were not material as of June&amp;#160;30, 2013 and
   December&amp;#160;31, 2012. Our restricted cash balance at June&amp;#160;30, 2013 and December&amp;#160;31, 2012 relates to a letter of credit which will continue to secure our corporate headquarter lease obligation to its expiration in 2014. &lt;/font&gt;&lt;/p&gt;
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