Common Stock (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Summary of Common Stock Shares Activity

The following table summarizes common stock share activity for the three months ended March 31, 2016:

	Shares of Common Stock	Common Stock		Additional Paid-in Capital		Accumulated Deficit			Total Stockholders' Equity
Balance, December 31, 2015	13,905,599	$	14	$	192,069	$	(150,134	)	$	41,949
Net loss	—	—		—		(7,184		)	(7,184		)
Stock-based compensation expense	—	—		274		—			274
Common stock issued through employee stock purchase plan	1,229	—		5		—			5
Balance, March 31, 2016	13,906,828	$	14	$	192,348	$	(157,318	)	$	35,044

Common Stock Reserved For Future Issuances

The Company had reserved shares of common stock for future issuance as follows:

	March 31, 2016	December 31, 2015
Outstanding stock options	1,450,453	1,379,727
Outstanding Series C-1 Preferred warrants	14,033	14,033
For possible future issuance under 2014 Equity Incentive Plan (Note 8)	1,037,822	552,415
For possible future issuance under Employee Stock Purchase Plan (Note 8)	78,465	50,283
For possible future issuance under 2015 Inducement Plan (Note 8)	165,000	165,000
Total common shares reserved for future issuance	2,745,773	2,161,458