Statements of Operations (unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Revenue:
Product revenue	$ 53,223		$ 45,525		$ 102,912		$ 92,297
Service revenue	14,975		11,679		27,248		24,042
Total revenue	68,198		57,204		130,160		116,339
Cost of sales	38,796		31,159		75,688		62,231
Gross profit	29,402		26,045		54,472		54,108
Operating expenses:
Product development and engineering	6,178		4,579		12,393		10,116
Selling, general and administrative	19,648		19,766		36,935		38,453
Total operating expenses	25,826		24,345		49,328		48,569
Operating income	3,576		1,700		5,144		5,539
Interest expense	(206)		(222)		(470)		(432)
Gain from settlement of deferred consideration obligation	0		0		0		520
Other income (loss), net	(424)		(361)		(289)		(91)
Income from continuing operations before income taxes	2,946		1,117		4,385		5,536
Provision for income taxes	1,635		2,257		3,381		3,693
Income (loss) from continuing operations	1,311		(1,140)		1,004		1,843
Income (loss) from discontinued operations, net of income taxes of $20 in 2011 and $980 and $1,243 for the three and six months in 2010, respectively	(3,177)		4,507		(3,414)		5,866
Net income (loss)	(1,866)		3,367		(2,410)		7,709
Less:
Net income from continuing operations attributable to noncontrolling interests	0		400		0		1,120
Net income (loss) attributable to MRV	(1,866)		2,967		(2,410)		6,589
Net income (loss) from continuing operations attributable to MRV	1,311		(1,540)		1,004		723
Net income (loss) from discontinued operations attributable to MRV	$ (3,177)		$ 4,507		$ (3,414)		$ 5,866
Net income (loss) attributable to MRV per share — basic:
From continuing operations	$ 0.01		$ (0.01)		$ 0.01		$ 0.00
From discontinued operations	$ (0.02)		$ 0.03		$ (0.02)		$ 0.04
Net income (loss) attributable to MRV per share — basic	$ (0.01)	[1]	$ 0.02	[1]	$ (0.02)	[1]	$ 0.04	[1]
Net income (loss) attributable to MRV per share — diluted:
From continuing operations	$ 0.01		$ (0.01)		$ 0.01		$ 0.00
From discontinued operations	$ (0.02)		$ 0.03		$ (0.02)		$ 0.04
Net income (loss) attributable to MRV per share — diluted	$ (0.01)	[1]	$ 0.02	[1]	$ (0.02)	[1]	$ 0.04	[1]
Weighted average number of shares:
Basic	157,449		157,684		157,510		157,657
Diluted	158,384		157,684		158,517		158,552

[1] (1) Amounts may not add due to rounding.