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Supplementary Financial Information - Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Numerator:      
Loss from continuing operations $ (5,187) $ (12,535) $ (1,277)
Denominator:      
Weighted average common shares used in basic computation (in shares) 32,174 32,049 32,595
Weighted average common shares used in diluted computation (in shares) 32,174 32,049 32,595
Loss from continuing operations per share:      
Basic (in dollars per share) $ (0.16) $ (0.39) $ (0.04)
Diluted (in dollars per share) $ (0.16) $ (0.39) $ (0.04)