Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Expense (Benefit) for Income Tax

The expense (benefit) for income taxes for the years ended December 31, was as follows:

	2012			2011			2010
Current tax expense
Federal	$	3,806		$	2,816		$	418
State		1,053			827			107
		4,859			3,643			525
Deferred tax expense (benefit)
Federal		(542	)		(809	)		(112	)
State		(174	)		(61	)		(47	)
		(716	)		(870	)		(159	)
Total tax expense	$	4,143		$	2,773		$	366

Summary of Company's Effective Tax Rate on Income From Continuing Operations and Statutory Tax Rate

The reconciliation between the Company’s effective tax rate on income from continuing operations and the statutory tax rate for the years ended December 31, was as follows:

	2012						2011						2010
	Amount			Percent			Amount			Percent			Amount			Percent
Income tax expense at federal statutory rate	$	3,687			34.0	%	$	2,324			34.0	%	$	658			34.0	%
State income tax, net of federal benefit		581			5.4			506			7.4			76			3.9
Non-deductible transaction expenses		—			—			259			3.8			—			—
Non-deductible private placement warrant expense		152			1.4			130			1.9			—			—
Domestic production activity		(221	)		(2.0	)		(216	)		(3.1	)		51			2.6
Research tax credits		(44	)		(0.4	)		(240	)		(3.5	)		(260	)		(13.4	)
Other, net		(12	)		(0.2	)		10			0.1			(159	)		(8.2	)
Income tax expense	$	4,143			38.2	%	$	2,773			40.6	%	$	366			18.9	%

Summary of Components of Net Deferred Tax Asset or Liability

Components of the net deferred tax asset or liability consisted of the following as of December 31:

	2012			2011
Allowances and bad debts	$	184		$	188
Accrued warranty		276			329
Accrued legal fees		—			124
Accrued wages and benefits		331			570
Inventory		862			484
Deferred revenue		512			81
Other		11			38
Total current deferred tax assets		2,176			1,814
Tax depreciation in excess of book		(371	)		(490	)
Stock compensation		192			—
Other		43			—
Total deferred tax liabilities		(136	)		(490	)
Net deferred tax assets	$	2,040		$	1,324