Statements of Operations (unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Revenue:
Product revenue	$ 48,154		$ 52,940		$ 151,066		$ 145,237
Service revenue	14,301		13,180		41,549		37,222
Total revenue	62,455		66,120		192,615		182,459
Cost of sales	37,368		38,631		113,056		100,862
Gross profit	25,087		27,489		79,559		81,597
Operating expenses:
Product development and engineering	5,666		5,654		18,059		15,770
Selling, general and administrative	15,918		16,443		52,853		54,896
Total operating expenses	21,584		22,097		70,912		70,666
Operating income	3,503		5,392		8,647		10,931
Interest expense	(217)		(242)		(687)		(674)
Gain from settlement of deferred consideration obligation	0		0		0		520
Other loss, net	(1,548)		(1,245)		(1,837)		(1,336)
Income from continuing operations before income taxes	1,738		3,905		6,123		9,441
Provision (benefit) for income taxes	(343)		874		3,038		4,567
Income from continuing operations	2,081		3,031		3,085		4,874
Income (loss) from discontinued operations, net of income taxes of $20 in 2011 and $859 and $2,102 for the three and nine months in 2010, respectively	0		543		(3,414)		6,409
Net income (loss)	2,081		3,574		(329)		11,283
Less:
Net income from continuing operations attributable to noncontrolling interests	0		696		0		1,816
Net income (loss) attributable to MRV	2,081		2,878		(329)		9,467
Net income from continuing operations attributable to MRV	2,081		2,335		3,085		3,058
Net income (loss) from discontinued operations attributable to MRV	$ 0		$ 543		$ (3,414)		$ 6,409
Net income (loss) attributable to MRV per share — basic:
From continuing operations (in dollars per share)	$ 0.01		$ 0.01		$ 0.02		$ 0.02
From discontinued operations (in dollars per share)	$ 0.00		$ 0.00		$ (0.02)		$ 0.04
Net income attributable to MRV per share — basic (in dollars per share)	$ 0.01		$ 0.02	[1]	$ 0.00	[1]	$ 0.06	[1]
Net income (loss) attributable to MRV per share — diluted:
From continuing operations (in dollars per share)	$ 0.01		$ 0.01		$ 0.02		$ 0.02
From discontinued operations (in dollars per share)	$ 0.00		$ 0.00		$ (0.02)		$ 0.04
Net income attributable to MRV per share — diluted (in dollars per share)	$ 0.01	[1]	$ 0.02	[1]	$ 0.00	[1]	$ 0.06	[1]
Weighted average number of shares:
Basic (in shares)	157,535		157,707		157,518		157,674
Diluted (in shares)	158,601		158,590		158,518		158,561

[1] Amounts may not add due to rounding.