Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Summary of Impact of Restatement on Condensed Statement of Comprehensive Loss and Condensed Balance Sheets

A summary of the impact of the restatement on the Condensed Statement of Comprehensive Loss and Condensed Balance Sheets are as follows:

Restatement effect on the Statement of Comprehensive Loss	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Net loss	$	(1,654	)	$	(2,266	)	$	(3,534	)	$	(4,157	)
Non-cash deemed dividend to preferred stock (restated)		(2,481	)		—			(2,481	)		—
Net loss attributable to common stock (restated)	$	(4,135	)	$	(2,266	)	$	(6,015	)	$	(4,157	)
Basic and diluted net loss per common share as previously reported	$	(0.74	)	$	(1.65	)	$	(1.70	)	$	(3.10	)
Difference in Basic and diluted net loss per common share as previously reported and restated	$	(1.12	)	$	(0.00	)	$	(1.19	)	$	(0.00	)
Basic and diluted net loss per share attributable to common stock (restated)	$	(1.86	)	$	(1.65	)	$	(2.89	)	$	(3.10	)
Weighted-average number of common shares outstanding		2,227			1,374			2,082			1,342

Restatement effect on the Balance Sheets	June 30, 2013
Stockholders’ equity
Additional paid-in capital as previously reported	$	236,357
Restatement adjustment due to non-cash deemed dividend		2,481
Additional paid-in capital restated	$	238,838
Accumulated deficit as previously reported	$	(228,966	)
Restatement adjustment due to non-cash deemed dividend		(2,481	)
Accumulated deficit restated	$	(231,447	)