Summary of Significant Accounting Policies (Tables)

9 Months Ended

Dec. 31, 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 comprehensive income for the three and nine months ended December 31, 2012 and 2011:

	Three Months Ended December 31,						Nine Months Ended December 31,
	2012			2011			2012			2011
Costs and expenses:
Cost of revenue	$	51		$	71		$	200		$	190
Research and development costs	76			56			209			133
Selling, general and administrative	456			677			1,557			2,142
Total share-based compensation	583			804			1,966			2,465
Income tax benefit	(174		)	(298		)	(621		)	(916		)
Decrease in net income	$	409		$	506		$	1,345		$	1,549