Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Domestic and Foreign Components of Net Loss

The domestic and foreign components of net loss were as follows (in thousands):

	Year Ended December 31,
	2015			2016			2017
Domestic	$	(6,191	)	$	(6,744	)	$	(10,125	)
Foreign		—			(116	)		305
Net Loss	$	(6,191	)	$	(6,860	)	$	(9,820	)

Schedule of Reconciliation of Statutory Federal Income Tax Rate to Net Income Taxes

A reconciliation of income taxes at the statutory federal income tax rate to net income taxes included in the accompanying consolidated statements of operations is as follows (in thousands):

	December 31,
	2015			2016			2017
Income tax at statutory rate	$	(2,104	)	$	(2,331	)	$	(3,339	)
Change in valuation allowance		3,137			2,146			(8,354	)
Change in tax rate		—			—			9,788
Change in deferreds		(852	)		—			(39	)
State tax		(184	)		9			536
Mark-to-market on warrants		—			178			1,267
Other		3			(2	)		301
Total	$	—		$	—		$	160

Schedule of Company's Deferred Tax Assets and Liabilities

Temporary differences that gave rise to significant portions of the Company’s deferred tax assets and liabilities as of December 31, 2016 and 2017 were as follows (in thousands):

	Year Ended December 31,
	2016			2017
Deferred tax assets:
Net operating losses	$	28,677			20,139
Credits		1,414			1,654
Accruals and reserves		519			643
Deferred revenue and contract costs		871			464
Gross deferred tax assets		31,481			22,900
Valuation allowance		(31,143	)		(22,789	)
Net deferred tax assets		338			111
Deferred tax liabilities:
Fixed assets and intangibles		(338	)		(111	)
Total deferred tax liabilities, net	$	—		$	—

Schedule of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows (in thousands):

Balance as of December 31, 2015	$	813
Increases for current year tax positions		63
Increases for prior year tax positions		(302	)
Balance as of December 31, 2016		574
Increases for current year tax positions		46
Increases for prior year tax positions		—
Balance as of December 31, 2017	$	620