| 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
September 30, | | For the nine months ended
September 30, | | | ($ in thousands except share and per share amounts) | | 2015 | | 2014 | | 2015 | | 2014 | | | Net loss attributable to common stockholders | | | (18,161) | | | (4,592) | | | (36,392) | | | (16,673) | | | Weighted average common shares outstandingbasic and diluted | | | 39,412,056 | | | 36,024,810 | | | 39,038,522 | | | 35,977,355 | | | Basic and diluted net loss per common share | | $ | (0.46) | | $ | (0.13) | | $ | (0.93) | | $ | (0.46) | |
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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 | | For the nine months ended | | | | | September 30, | | September 30, | | | | | 2015 | | 2014 | | 2015 | | 2014 | | | Warrants to purchase Common Stock | | | 685,061 | | | 685,061 | | | 685,061 | | | 696,526 | | | Options to purchase Common Stock | | | 1,832,499 | | | 2,171,032 | | | 2,019,219 | | | 2,312,461 | | | Unvested Restricted Stock | | | 6,884,631 | | | 6,308,038 | | | 6,795,132 | | | 5,880,063 | | | Unvested Restricted Stock Units | | | 752,761 | | | - | | | 258,242 | | | - | | | Total | | | 10,154,952 | | | 9,164,131 | | | 9,757,654 | | | 8,889,050 | |
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