Note 13 - Stock Plans (Detail) - Restricted Stock Award Forfeitures (2008 Restricted Stock Award [Member], USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
2008 Restricted Stock Award [Member]
Date Deemed Forfeited and Recorded as Treasury Stock	Jun. 30, 2011		Jun. 30, 2011		Jun. 30, 2010
Shares Forfeited	15,000	[1],[2]	8,000	[1]	9,000
Expense Recovered (in Dollars)	$ 101		$ 66		$ 70
Date Shares Returned to Plan	Apr. 01, 2013		Apr. 01, 2012		Apr. 01, 2011

[1] In October 2011, in connection with the termination of employment of a recipient, the forfeiture relating to approximately 2,000 shares scheduled to vest on April 1, 2012 and 2,000 shares scheduled to vest on April 1, 2013, included herein, became effective. Accordingly, these shares were removed from Treasury Stock at December 31, 2011. In addition, in connection with the termination of a recipient's employment, the forfeiture relating to approximately 2,000 shares scheduled to vest on April 1, 2012 and 2,000 shares scheduled to vest on April 1, 2013, included herein, became effective in January 2012. Accordingly, these shares were removed from Treasury Stock at January 31, 2012.

[2] In December 2012, in connection with the termination of employment of a recipient, the forfeiture relating to approximately 2,000 shares scheduled to vest on April 1, 2013, included herein, became effective. Accordingly, these shares were removed from Treasury Stock at December 31, 2012.