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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Cash flows from operating activities: |  |
Net loss | $ (10,830,868) | $ (8,858,280)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation | 115,517 | 39,841
Amortization of intangible assets | 239,813 | 447,927
Change in value of common stock warrants | 505,926 | 1,427,616
Stock-based compensation | 2,519,048 | 519,218
Interest income accrued on short-term investments | 0 | (506)
Deferred rent | 144,521 | (6,727)
Loss on disposal of fixed assets | 2,959 | 0
Loss on investment in affiliated entity | 376,963 | 836,084
Transaction costs associated with issuance of warrants | 0 | 315,970
Changes in operating assets and liabilities: |  |
Accounts receivable | 601,993 | (198,725)
Accounts receivable from affiliated entity | (18,652) | (7,303)
Prepaid expenses and other current assets | 129,671 | 188,284
Prepaid expenses and other current assets from affiliated entity | 284,033 | 54,673
Restricted cash | (87) | (87)
Other assets | 0 | 650
Accounts payable and accrued expenses | 73,484 | 180,041
Accounts payable and accrued expenses due to affiliated entity | 257,245 | 190,457
Deferred revenue | 147,502 | (153,088)
Deferred revenue from affiliated entity | (106,251) | (106,250)
Net cash used in operating activities | (5,557,183) | (5,130,205)
Cash flows from investing activities: |  |
Purchases of investments | (5,999,640) | (400,000)
Maturities of investments | 6,900,000 | 450,507
Purchases of capital assets | (181,760) | (39,709)
Net cash provided by investing activities | 718,600 | 10,798
Cash flows from financing activities: |  |
Proceeds from issuance of common stock and warrants, net of issuance costs | 59,209,182 | 19,556,383
Proceeds from stock option and warrant exercises | 10,682,201 | 4,991
Net cash provided by financing activities | 69,891,383 | 19,561,374
Effect of exchange rate changes on cash and cash equivalents | (1,689) | (1,189)
Increase in cash and cash equivalents | 65,051,111 | 14,440,778
Cash and cash equivalents, beginning of period | 33,719,796 | 5,646,021
Cash and cash equivalents, end of period | 98,770,907 | 20,086,799
Supplemental disclosure of non-cash activities |  |
Lease incentive | $ 50,000 | $ 0

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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Difference between actual rental income due and rental income recognized on a straight-line basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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