Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2017	Mar. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	38,383,751	38,326,329
Common stock, shares outstanding (in shares)	32,595,143	31,912,021
Treasury stock, shares (in shares)	5,788,608	6,414,308