Share-Based Compensation (Tables)

9 Months Ended

Dec. 31, 2011

Share-Based Compensation [Abstract]

Components Of Share-Based Compensation Expense

	Three Months Ended December 31,				Nine Months Ended December 31,
	2011		2010		2011		2010
Cost of product revenue	$	49	$	34	$	137	$	85
Cost of service revenue		49		22		161		152
Research and development		600		368		1,702		1,009
Sales and marketing		775		551		2,152		1,623
General and administrative		697		485		1,965		1,270
	$	2,170	$	1,460	$	6,117	$	4,139