Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Taxes

Schedule of Company's current and deferred expense for income tax

	Year Ended December 31,
	2017			2016
Current expense (benefit):
Federal	$	—		$	—
State		—			—
Foreign		—			—
Total current expense (benefit):	$	—		$	—
Deferred expense (benefit):
Federal	$	—		$	—
State		—			—
Foreign		(157	)		—
Total deferred expense (benefit):	$	(157	)	$	—
Total income tax expense (benefit):	$	(157	)	$	—

Schedule of reconciliation of the Company's statutory income tax rate to the Company's effective income tax rate

	Year Ended December 31,
	2017			2016
Federal statutory income tax rate		34.00	%		34.00	%
State taxes, net of federal benefit		4.42	%		—
Permanent differences		(2.27	)%		(6.50	)%
Tax credits		3.45	%		—
Tax law change		(37.65	)%		—
Foreign rate differential		(0.02	)%		—
Valuation allowance		(3.11	)%		(31.90	)%
Other		1.68	%		4.40	%
		0.50	%		0.00	%

Schedule of significant components of the Company's deferred tax assets

	Year Ended September 30,
	2017			2016
Federal net operating loss carryforwards	$	33,232		$	18,258
State net operating loss carryforwards		4,014			1,858
Stock Options		1,348			43
Federal research tax credits		1,799			1,308
State research tax credits		231			119
License fees		1,659			2,616
Accrued expenses		29			599
Other		182			31
Total deferred tax assets	$	42,494		$	24,832
Valuation allowance		(42,336	)		(24,832	)
Net deferred tax asset (liability)	$	158		$	—