Note 16 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Year Ended December 31,
(in thousands)	2019		2018		2017
Domestic	$	74,841	$	81,893	$	69,929
Foreign		6,352		9,762		4,506
Total	$	81,193	$	91,655	$	74,435

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
(in thousands)	2019			2018			2017
Current:
Federal	$	6,991		$	(782	)	$	17,808
State		2,882			2,078			1,367
Foreign		1,544			1,810			2,215
Deferred
Federal		5,121			11,325			865
State		269			538			193
Foreign		(809	)		(430	)		(1,918	)
Valuation Allowance		1,540			528			2,127
Total	$	17,538		$	15,067		$	22,657

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2019			2018			2017
Federal tax statutory rate		21.0	%		21.0	%		35.0	%
State tax (net of federal benefit)		2.1			2.0			1.7
Share based compensation		(0.5	)		(2.8	)		(0.8	)
Valuation allowance against deferred tax assets		1.4			0.7			2.9
Research and development credit		(2.8	)		(2.5	)		(2.2	)
Foreign rate differential		(0.3	)		(0.1	)		(1.9	)
Tax reserves		1.1			(0.1	)		0.9
Domestic manufacturing deduction		-			-			(2.5	)
Miscellaneous		(0.4	)		(0.5	)		(0.2	)
Transition tax		-			(0.8	)		3.2
Revaluation of deferred tax liability		-			(0.5	)		(5.7	)
Total		21.6	%		16.4	%		30.4	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
(in thousands)	2019			2018
Deferred tax assets:
Accrued expenses	$	1,362		$	931
Leases		3,337			-
Warrants and stock options		3,325			2,908
Intangible assets		1,171			748
Inventories		169			154
Other assets		1,765			666
Net operating loss		6,513			6,605
Less valuation allowance		(8,248	)		(6,900	)
Total deferred tax assets		9,394			5,112
Deferred tax liabilities:
Depreciation		(26,750	)		(21,788	)
Goodwill		(5,590	)		(3,486	)
Leases		(3,337	)		-
Total deferred tax liabilities		(35,677	)		(25,274	)
Net deferred tax liability	$	(26,283	)	$	(20,162	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	December 31,
	2019			2018
Balance at beginning of period	$	4,096		$	4,233
Additions for tax positions of current year		592			593
Additions for tax positions of prior years		-			309
Decrease related to expiration of statutes of limitations		(90	)		(1,039	)
Balance at period end	$	4,598		$	4,096