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,
	2001		2002		2003		2004		2005
	(in thousands, except for ratios)
Fixed Charges:
Interest expense	$	183	$	197	$	155	$	134	$	1,145
Portion of rent expense deemed to represent interest		236		242		325		358		392
Total fixed charges	$	419	$	439	$	480	$	492	$	1,537
Earnings:
Net income	$	810	$	9,400	$	7,718	$	12,992	$	37,985
Income taxes		180		5,056		4,344		7,934		20,347
Fixed charges		419		439		480		492		1,537
Total earnings for computation of ratio	$	1,409	$	14,895	$	12,542	$	21,418	$	59,869
Ratio of earnings to fixed charges		3.4		33.9		26.1		43.5		39.0