Condensed Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 36,019,411	$ 204,362
Marketable securities (less than 1 year)	33,149,318
Prepaid assets	1,532,787	22,704
Total current assets	70,701,516	227,066
Deferred financing costs		66,187
Marketable securities (more than 1 year)	4,928,631
Other assets	21,190
Total assets	75,651,337	293,253
Current liabilities:
Accounts payable	2,628,122	306,396
Accrued expenses	3,002,679	75,158
Convertible notes payable		200,000
Total current liabilities	5,630,801	581,554
Deferred revenue	1,500,000	1,500,000
Total liabilities	$ 7,130,801	$ 2,081,554
Commitments and contingencies (note 7)
Stockholders’ equity (deficit)
Common stock, $0.001 par value; 270,000,000 shares authorized; 15,153,135 and 143,810 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	$ 15,153	$ 144
Additional paid-in capital	144,380,633	2,411,007
Accumulated other comprehensive loss	(9,274)
Accumulated deficit	(75,865,976)	(54,478,323)
Total stockholders’ equity (deficit)	68,520,536	(1,788,301)
Total liabilities and stockholders’ equity (deficit)	$ 75,651,337	293,253
Series A Convertible Preferred Stock [Member]
Stockholders’ equity (deficit)
Series A convertible preferred stock; $0.001 par value, 405,405 shares authorized and 381,158 issued and outstanding as of December 31, 2014 (liquidation preference of $24,254,930)		15,388,287
Series B Convertible Preferred Stock [Member]
Stockholders’ equity (deficit)
Series A convertible preferred stock; $0.001 par value, 405,405 shares authorized and 381,158 issued and outstanding as of December 31, 2014 (liquidation preference of $24,254,930)		$ 34,890,584

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).