Quarterly Results (unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Results (unaudited) [Abstract]

Quarterly Financial Information

	2012 Quarterly Results
	March 31			June 30			September 30			December 31
Net sales	$	60,978		$	62,886		$	60,394		$	64,646
Gross margin		35,995			35,590			35,540			33,728
Loss before income taxes		(2,258	)		(3,758	)		(2,142	)		(16,571	)
Net loss		(1,863	)		(5,879	)		(3,826	)		(17,252	)
Net loss attributable to Merge		(1,842	)		(5,882	)		(3,814	)		(17,264	)
Net loss available to common shareholders		(1,842	)		(5,882	)		(3,814	)		(17,264	)
Basic and diluted loss per share	$	(0.02	)	$	(0.06	)	$	(0.04	)	$	(0.19	)

	2011 Quarterly Results
	March 31			June 30			September 30			December 31
Net sales	$	52,672		$	55,592		$	60,077		$	64,087
Gross margin		30,569			36,861			36,128			40,216
Income (loss) before income taxes		(744	)		341			(1,255	)		(208	)
Net loss		(1,589	)		(1,685	)		(1,013	)		(1,244	)
Net loss attributable to Merge		(1,589	)		(1,685	)		(995	)		(1,252	)
Net loss available to common shareholders		(3,155	)		(3,272	)		(995	)		(1,252	)
Basic and diluted loss per share	$	(0.04	)	$	(0.04	)	$	(0.01	)	$	(0.01	)

	2010 Quarterly Results
	March 31			June 30			September 30			December 31
Net sales	$	19,970		$	29,003		$	45,189		$	46,170
Gross margin		13,554			12,989			24,451			24,775
Loss before income taxes		(3,104	)		(14,903	)		(3,459	)		(3,696	)
Net income (loss)		(3,152	)		(14,961	)		(3,446	)		10,043
Net income (loss) attributable to Merge		(3,104	)		(15,009	)		(3,446	)		10,043
Net income (loss) available to common shareholders		(3,152	)		(30,905	)		(5,012	)		8,477
Basic and diluted income (loss) per share	$	(0.04	)	$	(0.39	)	$	(0.06	)	$	0.10