Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Taxes [Abstract]

Schedule of Components of Income Tax

For the years ended December 31,	2013		2012		2011
(dollars in thousands)
Current provision (benefit)
Federal	$	85	$	(5,782)	$	3
State		(6)		(440)		280
Deferred (benefit) provision
Federal		(3,205)		13,143		9,897
State		622		(587)		176
(Benefit) provision for income taxes	$	(2,504)	$	6,334	$	10,356

Schedule of Effective Income Tax Rate Reconciliation

For the years ended December 31,	2013		2012		2011
Federal statutory tax rate	35.0	%	35.0	%	35.0	%
Research and development tax credit	14.6		(3.5)		-
State government grants, net of federal tax impact	4.2		(0.1)		(0.3)
Valuation allowance, state government grants, net of federal impact	(15.0)		-		-
Domestic manufacturing deduction	-		2.7		-
State income taxes, net of federal impact	1.4		(4.0)		1.6
Other, net	(2.1)		0.1		0.1
Effective income tax rate	38.1	%	30.2	%	36.4	%

Schedule of Deferred Tax Assets and Liabilities

December 31,	2013		2012
(dollars in thousands)
Current deferred tax assets:
Inventory	$	3,454	$	7,457
Federal tax carryforwards		6,459		11,774
Share-based compensation		2,621		2,271
Receivables		98		684
Accrued liabilities		633		746
Other		65		65
Total current deferred tax assets	$	13,330	$	22,997
Noncurrent deferred tax assets:
Federal and state tax carryforwards	$	15,553	$	4,640
Deferred tax liabilities:
Property, plant and equipment (noncurrent)	$	58,085	$	59,867
Other (current)		288		258
	$	58,373	$	60,125