SEGMENT AND MAJOR CUSTOMER INFORMATION (Detail) - Schedule Of Segment Reporting Information By Segment (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Net revenues	$ 44,333	$ 38,472	$ 40,040	$ 43,992	$ 42,686	$ 40,235	$ 36,086	$ 31,119	$ 166,837	$ 150,126	$ 101,330
Gross profit	21,011	19,440	19,642	21,617	20,832	18,864	16,894	14,203	81,710	70,793	41,969
Gross margin									49.00%	47.00%	41.00%
Metrology Solutions [Member]
Net revenues									106,189	92,947	65,841
Gross profit									61,523	50,913	33,652
Gross margin									58.00%	55.00%	51.00%
Optical Systems [Member]
Net revenues									60,648	57,179	35,489
Gross profit									$ 20,187	$ 19,880	$ 8,317
Gross margin									33.00%	35.00%	23.00%