Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES

          Set forth below is information concerning our ratio of earnings to fixed charges on a consolidated basis for the periods indicated. This ratio shows the extent to which our business generates enough earnings after the payment of all expenses other than interest to make the required interest payments on the convertible senior subordinated notes.

          For purposes of computing the ratio of earnings to fixed charges, “earnings” consist of income before income taxes and fixed charges. “Fixed charges” consist of interest expense and the portion of rent expense we believe represents the interest component of such rent expense.

	Years ended June 30,
	2002		2003		2004		2005		2006
	(in thousands, except for ratios)
Fixed charges:
Interest expense	$	197	$	155	$	134	$	1,145	$	1,939
Portion of rent expense deemed to represent interest		242		325		358		392		262
Total fixed charges	$	439	$	480	$	492	$	1,537	$	2,201
Earnings:
Net income	$	9,400	$	7,718	$	12,992	$	37,985	$	13,701
Income taxes		5,056		4,344		7,934		20,347		11,822
Fixed charges		439		480		492		1,537		2,201
Total earnings for computation of ratio	$	14,895	$	12,542	$	21,418	$	59,869	$	27,724
Ratio of earnings to fixed charges		33.9		26.1		43.5		39.0		12.6