Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

The provision for income taxes consists of the following components:

Income taxes have been based on the following components of income (loss) before provision for income taxes:

The Irish federal statutory rate is reconciled to the effective tax rate as follows:

	Year ended December 31, 2019		Year ended December 31, 2018		Year ended December 31, 2017
Statutory rate	12.50%	$(12,836)	12.50%	$(9,573)	12.50%	$(3,620)
Impact of U.S. tax rate	(0.07)%	72	(0.11)%	81	(0.80)%	232
Impact of valuation allowance	(12.91)%	13,258	(11.42)%	8,749	(13.64)%	3,949
Research and development tax credit	0.23%	(232)	0.45%	(341)	0.76%	(220)
Adjustments for current tax of prior periods	(0.24)%	241	0.00%	—	0.00%	—
Other, net	0.06%	(59)	(2.03)%	1,557	(0.36)%	103
Effective tax rate	(0.43)%	$444	(0.61)%	$472	(1.54)%	$444

The significant components of the Company’s deferred tax assets and liabilities are as follows:

	Year ended December 31,
	2019			2018			2017
Deferred tax assets
Share-based compensation	$	679		$	27		$	3
Depreciation		(24	)		(49	)		6
Net operating loss carryforwards		26,195			13,648			5,409
163(j) interest expense limitation		730			115			—
Other		84			665			239
Valuation allowance		(27,664	)		(14,406	)		(5,657	)
Total deferred tax assets	$	—		$	—		$	—

Deferred tax liabilities
		—			—			—
Total deferred tax assets	$	—		$	—		$	—

Net deferred tax asset	$	—		$	—		$	—

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows: