Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of components of the provision for income taxes

​	2016			2015
Current tax provision:	​			​
Federal	​	$	—	​	$	—
State	​	​	10	​	​	6
Deferred tax provision:	​			​
Federal	​	​	—	​	​	—
State	​	​	—	​	​	—
Total	​	$	10	​	$	6

Schedule of differences between the Company's effective income tax rate and the Federal statutory income tax rate

​	2016		2015
Federal statutory rate	​	34.00%	​	34.00%
State income tax rate, net of federal benefit	​	(0.2)%	​	(0.05)%
Change in valuation allowance	​	(26.85)%	​	(33.95)%
Other	​	(7.26)%	​	(0.07)%
Effective income tax rate	​	(0.31)%	​	(0.07)%

Schedule of deferred tax assets

​	2016			2015
Deferred tax assets:	​	​	​	​	​	​
Net operating loss carryforwards	​	$	5,730	​	$	4,732
Deferred Revenue	​	​	194	​	​	453
Depreciation and amortization	​	​	30	​	​	18
Stock-based compensation	​	​	1,089	​	​	1,105
Accrual and reserves	​	​	117	​	​	132
Research and Development Credits	​	​	96	​	​	130
Total gross deferred tax assets	​	​	7,256	​	​	6,570
Less valuation allowance	​	​	(7,256)	​	​	(6,570)
Net deferred tax assets	​	$	—	​	$	—