Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Jun. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts receivable	$ 503	$ 709
Property and equipment, accumulated depreciation	$ 35,785	$ 29,443
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	48,432,280	46,832,208
Common stock, shares outstanding	33,674,481	33,465,732
Common treasury shares	14,757,799	13,366,476