Share-Based Compensation (Details) (USD $)		12 Months Ended				12 Months Ended		12 Months Ended
	Mar. 31, 2013 item	Mar. 31, 2013 Stock options item	Mar. 31, 2012 Stock options	Mar. 31, 2011 Stock options	Mar. 31, 2010 Stock options	Mar. 31, 2013 Stock options Maximum	Mar. 31, 2013 2005 Plan	Mar. 31, 2013 2005 Plan Stock options	Mar. 31, 2012 2005 Plan Stock options	Mar. 31, 2011 2005 Plan Stock options	Mar. 31, 2013 2004 Directors Plan	Mar. 31, 2012 2004 Directors Plan	Mar. 31, 2011 2004 Directors Plan	Mar. 31, 2013 2004 Directors Plan Stock options Non-employee director	Mar. 31, 2013 2004 Directors Plan Restricted stock Non-employee director	Mar. 31, 2013 2004 Directors Plan Restricted stock Director serving as Chairman of the Board
Share-Based Compensation
Number of shareholder approved equity based plans	2
Share-based compensation
Life of award						10 years								10 years
Initial option grant upon joining the Board (in shares)														6,000
Vesting Period														6 months	6 months	6 months
Shares issued to each non-employee director annually															4,000	1,000
Shares authorized, available for future grant and outstanding
Authorized (in shares)	2,275,000						2,075,000				200,000
Available (in shares)	541,601						411,478				130,123
Outstanding (in shares)	1,495,856	1,495,856	1,251,166	426,650	333,606		1,483,856				12,000
Share-based compensation
Number of options which award life in excess of ten years		0
Compensation expense (in dollars)								$ 653,000	$ 407,000	$ 47,000	$ 77,000	$ 46,000	$ 27,000