| Calculation of Basic and Diluted Net Loss Per Share |
A calculation of basic and diluted net loss per common share follows: | | | For the three months ended June 30, | | For the six months ended June 30, | | | ($ in thousands except share and per share amounts) | | 2015 | | 2014 | | 2015 | | 2014 | | | Net loss | | | (6,175) | | | (4,711) | | | (18,231) | | | (12,081) | | | Weighted average common shares outstandingbasic and diluted | | | 39,119,606 | | | 36,005,294 | | | 38,848,660 | | | 35,953,234 | | | Basic and diluted net loss per common share | | $ | (0.16) | | $ | (0.13) | | $ | (0.47) | | $ | (0.34) | |
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| Computations of Diluted Weighted Average Shares Outstanding |
The following shares of potentially dilutive securities have been excluded from the computations of diluted weighted average shares outstanding, as the effect of including such securities would be anti-dilutive: | | | For the three months ended June 30, | | For the six months ended June 30, | | | | | 2015 | | 2014 | | 2015 | | 2014 | | | Warrants to purchase Common Stock | | 685,061 | | 692,916 | | 685,061 | | 702,353 | | | Options to purchase Common Stock | | 2,071,032 | | 2,187,076 | | 2,114,126 | | 2,384,348 | | | Unvested Restricted Stock | | 6,912,530 | | 6,308,368 | | 6,749,641 | | 5,662,528 | | | Unvested Restricted Stock Units | | 11,000 | | - | | 6,884 | | - | | | Total | | 9,679,623 | | 9,188,360 | | 9,555,712 | | 8,749,229 | |
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