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Net (Loss) Income Per Share (Details) - USD ($)
 3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Reconciliation of basic and diluted net (loss) income per share [Abstract]    
Net (loss) income $ (5,014,000) $ 8,151,000
Basic shares (in shares) 18,895,847 18,655,304
Effect of potentially dilutive securities (in shares) 0 766,048
Diluted shares (in shares) 18,895,847 19,421,352
Net (loss) income per share [Abstract]    
Basic net (loss) income per share (in dollars per share) $ (0.27) $ 0.44
Diluted net (loss) income per share (in dollars per share) $ (0.27) $ 0.42
Options [Member]    
Antidilutive Securities [Abstract]    
Antidilutive shares excluded from computation of earnings per share (in shares) 1,380,598 111,172
Exercise price of options, lower range (in dollars per share) $ 4.17 $ 30.31
Exercise price of options, upper range (in dollars per share) $ 34.17 $ 34.17