Summary of Significant Accounting Policies (Tables)

6 Months Ended

Sep. 30, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Stock-based compensation expense

The following table shows total share-based compensation expense included in the consolidated statements of income for the three and six months ended September 30, 2012 and 2011:

	Three Months Ended September 30,						Six Months Ended September 30,
	2012			2011			2012			2011
Costs and expenses:
Cost of revenue	$	73		$	70		$	149		$	119
Research and development costs	74			44			133			77
Selling, general and administrative	272			591			1,101			1,465
Total share-based compensation	419			705			1,383			1,661
Income tax benefit	(127		)	(260		)	(447		)	(618		)
Decrease in net income	$	292		$	445		$	936		$	1,043