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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2018
Deferred Components of Benefit (Provision) for Income Taxes

The components of the benefit (provision) for income taxes were as follows:

 

 

 

Year Ended December 31,

 

 

 

2018

 

 

2017

 

 

2016

 

 

 

(in thousands)

 

Current benefit (provision) for income taxes:

 

 

 

 

 

 

 

 

 

 

 

 

Singapore

 

$

(4

)

 

$

199

 

 

$

 

Rest of world

 

 

(65

)

 

 

(133

)

 

 

(1,180

)

Total current benefit (provision) for income taxes

 

$

(69

)

 

$

66

 

 

$

(1,180

)

Deferred benefit (provision) for income taxes:

 

 

 

 

 

 

 

 

 

 

 

 

Singapore

 

$

 

 

$

(134

)

 

$

134

 

Rest of world

 

 

 

 

 

(774

)

 

 

564

 

Total deferred benefit (provision) for income taxes

 

$

 

 

$

(908

)

 

$

698

 

Total benefit (provision) for income taxes

 

$

(69

)

 

$

(842

)

 

$

(482

)

Components of Deferred Tax Assets and Liabilities

The components of the Company’s deferred tax assets and liabilities as of December 31, 2018 and 2017 are as follows:

 

 

 

December 31,

 

 

 

2018

 

 

2017

 

 

 

(in thousands)

 

Deferred tax assets:

 

 

 

 

 

 

 

 

Net operating loss carryforwards

 

$

58,661

 

 

$

28,913

 

Federal and state tax credits

 

 

13,783

 

 

 

4,522

 

Accrued expenses

 

 

4,276

 

 

 

1,903

 

Share-based compensation

 

 

3,811

 

 

 

1,921

 

Accumulated amortization

 

 

18,829

 

 

 

 

Other

 

 

1,267

 

 

 

176

 

Total deferred tax assets

 

 

100,627

 

 

 

37,435

 

Valuation allowance

 

 

(99,438

)

 

 

(36,069

)

Net deferred tax assets

 

 

1,189

 

 

 

1,366

 

Deferred tax liabilities:

 

 

 

 

 

 

 

 

Accumulated depreciation

 

 

(1,155

)

 

 

(1,366

)

Other

 

 

(34

)

 

 

 

Total deferred tax liabilities

 

 

(1,189

)

 

 

(1,366

)

Net deferred tax assets (liabilities)

 

$

 

 

$

 

Summary of Valuation Allowance

A roll-forward of the valuation allowance for the years ended December 31, 2018 and 2017 is as follows:

 

 

 

Year Ended December 31,

 

 

 

2018

 

 

2017

 

 

 

(in thousands)

 

Balance at beginning of year

 

$

36,069

 

 

$

15,999

 

Increase in valuation allowance

 

 

63,337

 

 

 

20,595

 

Reversal of valuation allowance

 

 

 

 

 

(598

)

Effect of foreign currency translation

 

 

32

 

 

 

73

 

Balance at end of year

 

$

99,438

 

 

$

36,069

 

Summary of Activity in Unrecognized Tax Benefits

A summary of activity in the Company’s unrecognized tax benefits is as follows:

 

 

 

2018

 

 

2017

 

 

2016

 

 

 

(in thousands)

 

Unrecognized tax benefit at the beginning of the year

 

$

6,207

 

 

$

2,343

 

 

$

1,280

 

Tax positions related to prior years

 

 

430

 

 

 

 

 

 

(1,066

)

Tax positions related to the current year

 

 

3,582

 

 

 

3,864

 

 

 

2,129

 

Unrecognized tax benefit at the end of the year

 

$

10,219

 

 

$

6,207

 

 

$

2,343

 

Singapore [Member]  
Reconciliation of Statutory Income Tax Rate

A reconciliation of the Singapore statutory income tax rate to the Company’s effective income tax rate is as follows:

 

 

 

Year Ended December 31,

 

 

 

2018

 

 

2017

 

 

2016

 

Singapore statutory income tax rate

 

 

17.0

%

 

 

17.0

%

 

 

17.0

%

Federal and state tax credits

 

 

6.6

 

 

 

5.7

 

 

 

3.1

 

Permanent differences

 

 

(0.3

)

 

 

(2.6

)

 

 

(0.9

)

Changes in reserves for uncertain tax positions

 

 

(2.3

)

 

 

(3.5

)

 

 

(3.6

)

Foreign rate differential

 

 

7.8

 

 

 

2.8

 

 

 

(0.1

)

Tax rate change

 

 

(0.3

)

 

 

(0.9

)

 

 

 

Other

 

 

0.2

 

 

 

0.4

 

 

 

(0.7

)

Change in deferred tax asset valuation allowance

 

 

(28.7

)

 

 

(19.7

)

 

 

(15.7

)

Effective income tax rate

 

 

 

 

 

(0.8

)%

 

 

(0.9

)%