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Net (Loss) Income Per Share (Details) - USD ($)
 3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Net (Loss) Income Per Share [Abstract]        
Net (loss) income $ (6,806,000) $ 11,110,000 $ 7,121,000 $ 27,761,000
Basic shares (in shares) 19,069,152 18,675,125 18,814,967 18,587,946
Effect of potentially dilutive securities (in shares) 0 766,140 585,777 811,911
Diluted shares (in shares) 19,069,152 19,441,265 19,400,744 19,399,857
Net (loss) income per share [Abstract]        
Basic net (loss) income per share (in dollars per share) $ (0.36) $ 0.59 $ 0.38 $ 1.49
Diluted net (loss) income per share (in dollars per share) $ (0.36) $ 0.57 $ 0.37 $ 1.43
Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares excluded from computation of earnings per share (in shares) 1,170,441 292,415 289,572 291,215
Exercise price of options, lower range (in dollars per share) $ 4.17 $ 26.47 $ 28.68 $ 28.68
Exercise price of options, upper range (in dollars per share) $ 34.17 $ 34.17 $ 34.17 $ 34.17