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v2.4.0.8

Consolidated Balance Sheets (USD $) | Sep. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Current assets: |  |  |
Cash and cash equivalents | $ 33,569,198 | $ 47,743,155 | $ 55,218,361
Accounts receivable | 2,281,282 | 2,046,219 | 3,397,869
Prepaid expenses | 1,103,449 | 137,634 | 46,474
Total current assets | 36,953,929 | 49,927,008 | 58,662,704
Restricted cash | 404,850 | 404,850 | 582,171
Property and equipment, net | 4,469,882 | 3,267,796 | 3,287,683
Other assets | 147,246 | 147,246 | 148,026
Total assets | 41,975,907 | 53,746,900 | 62,680,584
Current liabilities: |  |  |
Accounts payable | 1,798,228 | 3,739,125 | 11,051,456
Accrued expenses | 939,811 | 1,237,025 | 1,051,825
Lease exit liability - current | 1,229,454 | 628,768 | 533,560
Deferred revenue - current | 21,298,318 | 24,123,176 | 31,652,533
Total current liabilities | 25,265,811 | 29,728,094 | 44,289,374
Lease exit liability | 8,378,184 | 9,445,171 | 10,073,939
Deferred rent liability | 2,888,688 | 2,801,653 | 2,360,838
Preferred stock warrant liability | 679,296 | 52,947 | 203,642
Deferred revenue, net of current portion | 8,812,342 | 19,956,343 | 23,237,075
Total liabilities | 46,024,321 | 61,984,208 | 80,164,868
Stockholders' equity (deficit): |  |  |
Common stock, $0.01 par value - 425,000,000 shares authorized, 1,049,030 issued and outstanding at December 31, 2011, 1,098,914 issued and outstanding at December 31, 2012, 2,124,624 issued and outstanding at September 30, 2013 and 19,196,684 at September 30, 2013 (Pro Forma) | 21,246 | 10,989 | 10,490
Treasury stock, at cost; 14,381 shares at September 30, 2013 and December 31, 2012 | (57,742) | (57,742) | (57,742)
Additional paid-in capital | 165,569,134 | 164,334,646 | 163,449,924
Accumulated deficit | (172,528,254) | (175,472,403) | (183,834,158)
Total stockholders' equity (deficit) | (4,048,414) | (8,237,308) | (17,484,284)
Total liabilities and stockholders' equity (deficit) | 41,975,907 | 53,746,900 | 62,680,584
Pro Forma [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Common stock, $0.01 par value - 425,000,000 shares authorized, 1,049,030 issued and outstanding at December 31, 2011, 1,098,914 issued and outstanding at December 31, 2012, 2,124,624 issued and outstanding at September 30, 2013 and 19,196,684 at September 30, 2013 (Pro Forma) | 191,967 |  |
Treasury stock, at cost; 14,381 shares at September 30, 2013 and December 31, 2012 | (57,742) |  |
Additional paid-in capital | 168,345,615 |  |
Accumulated deficit | (172,528,254) |  |
Total stockholders' equity (deficit) | (4,048,414) |  |
Total liabilities and stockholders' equity (deficit) | 41,975,907 |  |
Series A-1 Convertible Preferred Stock [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Convertible preferred stock | 268,748 | 268,748 | 268,748
Series A-2 Convertible Preferred Stock [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Convertible preferred stock | 73,646 | 73,646 | 73,646
Series B Convertible Preferred Stock [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Convertible preferred stock | 714,012 | 714,012 | 714,012
Series C Convertible Preferred Stock [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Convertible preferred stock | 1,109,522 | 1,109,522 | 1,109,522
Series D Convertible Preferred Stock [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Convertible preferred stock | 144,462 | 144,462 | 144,462
Series D-2 Convertible Preferred Stock [Member] |  |  |
Stockholders' equity (deficit): |  |  |
Convertible preferred stock | $ 636,812 | $ 636,812 | $ 636,812

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