INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of income tax (benefit) expense

The income tax (benefit) expense consisted of the following (in thousands):

	Years Ended December 31,
	2019			2018			2017
Current:
Federal	$	(630	)	$	(1,136	)	$	2,162
State	179			1,469			5,358
Total current	$	(451	)	$	333		$	7,520
Deferred:
Federal	$	432		$	42,886		$	(172,048	)
State	(28		)	(3,565		)	(10,726		)
Total deferred	$	404		$	39,321		$	(182,774	)
Total income tax (benefit) expense	$	(47	)	$	39,654		$	(175,254	)

Schedule of reconciliation of the statutory U.S. federal income tax rate to the entity's effective income tax rate

The reconciliation of the statutory U.S. federal income tax rate to our effective income tax rate from continuing operations was as follows:

	Years Ended December 31,
	2019		2018		2017
Statutory U.S. federal tax rate	21.0	%	21.0	%	35.0	%
State taxes, net of federal benefit	2.6		4.7		3.3
Impact of 2017 tax reform on deferred tax balance	—		—		4.6
Equity-based compensation expense	(0.4	)	(1.5	)	(0.8	)
Contingent consideration	—		7.2		4.4
In-process research and development	(3.4	)	—		—
Other permanent items, net	(0.4	)	(1.4	)	(0.5	)
Tax credits	0.4		6.2		0.7
Valuation allowance	(19.8	)	(67.4	)	(0.8	)
Other, net	—		0.6		0.2
Effective tax rate	—	%	(30.6	)%	46.1	%

Schedule of components of the entity's deferred tax assets and liabilities

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

	December 31,
	2019			2018
Assets
Net operating loss carryforwards	$	79,679		$	46,888
Tax credit carryforwards	28,641			24,290
Capital loss carryforwards	20,659			20,896
Interest expense carryforwards	5,746			4,318
Equity-based compensation expense	6,106			5,931
Capitalized research & development	2,347			4,635
Intangible assets	67,847			12,565
Reserves	5,721			2,683
Lease liability	5,739			—
Property, plant and equipment	391			—
Contingent consideration	4			87
Other	9,329			5,389
Valuation allowance	(216,774		)	(113,278		)
Liabilities
Property, plant and equipment depreciation	—			(614		)
Debt instruments	(9,195		)	(12,489		)
Right of use asset	(5,599		)	—
Other	(11		)	(41		)
Net deferred tax assets	$	630		$	1,260

Summary of income tax contingencies

A reconciliation of our changes in unrecognized tax benefits is as follows (in thousands):

	Years Ended December 31,
	2019			2018		2017
Unrecognized tax benefits at the beginning of the year	$	11,180		$	10,560	$	13,020
Additions based on tax positions related to the current year	521			12		574
Additions for tax positions from prior years	2,173			608		340
Subtractions for federal tax reform	—			—		(3,296		)
Subtractions for tax positions from prior years	(336		)	—		(78		)
Unrecognized tax benefits at the end of the year	$	13,538		$	11,180	$	10,560