Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of components of income tax provision (benefit)

Components of the income tax (benefit) expense are as follows (in thousands):

	Year ended December 31,
	2018			2017			2016
Current:
Federal	$	—		$	(1,126	)	$	(3,325	)
State	97			587			(126		)
Foreign	(740		)	488			(526		)
Total current	(643		)	(51		)	(3,977		)
Deferred:
Federal	(6,585		)	5,994			1,904
State	(89		)	214			(85		)
Foreign	101			(45		)	(46		)
Total deferred	(6,573		)	6,163			1,773
Income tax (benefit) expense	$	(7,216	)	$	6,112		$	(2,204	)

Schedule of domestic and foreign net income (loss) before taxes

The components of (loss) income before income taxes are as follows (in thousands):

	Year ended December 31,
	2018			2017			2016
United States	$	(80,034	)	$	(10,025	)	$	(5,292	)
Foreign	(623		)	(1,367		)	(1,359		)
(Loss) income before income taxes	$	(80,657	)	$	(11,392	)	$	(6,651	)

Schedule of effective income tax rate reconciliation

A reconciliation of the U.S. federal statutory tax rate to the effective income tax rate is as follows:

	Year ended December 31,
	2018		2017		2016
Federal statutory tax rate	21.0	%	35.0	%	35.0	%
State income taxes, net of federal benefit	0.8		(3.2	)	2.5
Non-U.S. income taxed at different rates	0.8		(4.3	)	(0.6	)
(Increase) decrease in valuation allowance	(3.6	)	0.1		(0.2	)
Impact of 2017 Tax Cuts and Jobs Act	—		(64.2	)	—
Net operating loss carryback adjustment	—		—		(4.7	)
Reduction in tax benefit related to stock-based awards	(1.0	)	(16.9	)	—
Non-deductible expenditures and goodwill	(9.0	)	(3.9	)	(6.1	)
Research and development credit	0.3		3.6		5.7
Other	(0.4	)	0.1		1.5
Effective income tax rate	8.9	%	(53.7	)%	33.1	%

Schedule of deferred tax assets and liabilities

The components of deferred tax assets and liabilities are as follows (in thousands):

	December 31,
	2018			2017
Deferred tax assets:
Net operating loss carryforwards	$	30,241		$	24,569
Allowance for doubtful accounts	1,073			981
Inventory valuation reserves	1,057			827
Equity compensation	548			685
Goodwill	1,089			—
Accrued compensation	342			222
Foreign tax credit carryforward	4,041			3,955
Interest expense limitation	534			—
Other	50			—
Total gross deferred tax assets	38,975			31,239
Valuation allowance	(4,042		)	(1,187		)
Total deferred tax assets, net	34,933			30,052
Deferred tax liabilities:
Property and equipment	(6,613		)	(6,216		)
Intangible assets	(9,657		)	(10,084		)
Goodwill	—			(365		)
Convertible debt	—			(619		)
Unearned revenue	—			(52		)
Prepaid insurance and other	—			(3		)
Total gross deferred tax liabilities	(16,270		)	(17,339		)
Net deferred tax assets	$	18,663		$	12,713