Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Schedule of Estimated Stock-Based Compensation Expense

Stock-based compensation expense, net of estimated forfeitures, is reflected in the condensed statements of operations and comprehensive loss as follows (in thousands):

									Cumulative Period From December 10, 2008 (Date of Inception) to June 30, 2014
	Three Months Ended June  30,				Six Months Ended June  30,
	2014		2013		2014		2013
Operating Expenses
Research and development	$	242	$	29	$	367	$	54	$	735
General and administrative		825		17		1,126		34		1,306
Total	$	1,067	$	46	$	1,493	$	88	$	2,041