Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Provisions for Income Taxes

The provisions for income taxes are:

	2019			2018			2017
Current:
Federal	$	(235	)	$	5,641		$	2,124
State		(151	)		1,777			1,347
Foreign		2,956			2,121			570
Deferred:
Federal		2,867			650			160
State		1,548			(365	)		242
Foreign		(1,783	)		(679	)		—
	$	5,202		$	9,145		$	4,443

Total Income Tax Expense Applying U.S. Federal Income Tax Rate

Total income tax expense differed from the amounts computed by applying the U.S. Federal income tax rate of 21.0% in 2019 and 2018 and 35% in 2017 to income before income tax expense, as a result of the following:

	2019			2018			2017
Computed tax expense at statutory federal rates	$	3,993		$	7,054		$	8,651
Increase (decrease) in taxes resulting from:
State taxes, net of federal income tax benefit		1,131			1,627			988
Domestic production deduction		—			—			(150	)
Impact of the enactment of the Tax Cuts and Jobs    Act (net)		—			1,089			(3,433	)
Income tax credits		(819	)		(689	)		(431	)
Foreign tax rate differential		341			(37	)		(1,503	)
Subpart F income		—			14			3
(Gain) loss on equity investments		—			(61	)		62
Stock based compensation		366			277			262
Global intangible low-taxed income		249			—			—
Other		(59	)		(129	)		(6	)
	$	5,202		$	9,145		$	4,443

Components of Income before Provision

Income before provision for income taxes and losses on equity investments are:

	2019		2018		2017
Domestic	$	15,465	$	26,124	$	18,931
Foreign		3,547		7,472		5,922
	$	19,012	$	33,596	$	24,853

Deferred Tax Assets and Liability

Temporary differences between the financial statement carrying amounts and tax bases of assets and liabilities that give rise to significant portions of the net deferred tax liability at December 31, 2019 and 2018 relate to the following:

	2019		2018
Deferred tax asset
Inventories	$	2,912	$	3,299
State income taxes		328		53
Program accrual		7,529		7,088
Vacation pay accrual		756		685
Accrued bonuses		599		1,246
Bad debt expense		627		294
Stock compensation		2,755		1,723
NOL carryforward		1,141		580
Tax credits		824		779
Lease liability		3,308		—
Other		209		266
Deferred tax asset	$	20,988	$	16,013
Deferred tax liability
Plant and equipment, principally due to differences in            depreciation and capitalized interest	$	35,545	$	30,269
Lease asset		3,265		—
Prepaid expenses		1,323		1,107
Deferred tax liability	$	40,133	$	31,376
Total net deferred tax liability	$	19,145	$	15,363

Gross Unrecognized Tax Benefits

The following is a roll-forward of the Company’s total gross unrecognized tax benefits, not including interest and penalties, for the years ended December 31, 2019 and 2018:

	2019			2018
Balance at beginning of year	$	2,170		$	2,118
Additions for tax positions related to the current year		155			128
Additions for tax positions related to the prior years		27			24
Additions for tax positions related to acquired businesses		2,458			—
Reduction for tax positions related to the prior years		(213	)		(100	)
Balance at end of year	$	4,597		$	2,170