Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015
Allowances for accounts receivable	$ 180	$ 458
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	37,165,416	36,837,864
Common stock, shares outstanding	27,739,886	27,421,533
Treasury stock, shares	9,425,530	9,416,331