Segment and Major Customer Information (Detail) - Schedule of segment reporting information by segment (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Net revenues	$ 34,533	$ 38,472	$ 109,374	$ 122,504
Gross profit	15,260	19,440	48,036	60,699
Gross margin	44.00%	51.00%	44.00%	50.00%
Metrology Solutions [Member]
Net revenues	21,273	24,161	68,566	79,482
Gross profit	11,796	14,033	37,724	46,474
Gross margin	55.00%	58.00%	55.00%	58.00%
Optical Systems [Member]
Net revenues	13,260	14,311	40,808	43,022
Gross profit	$ 3,464	$ 5,407	$ 10,312	$ 14,225
Gross margin	26.00%	38.00%	25.00%	33.00%