Quarterly report pursuant to Section 13 or 15(d)

Share Repurchases (Details Textual)

v3.10.0.1
Share Repurchases (Details Textual) - Class A Common Stock - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
May 17, 2017
Aug. 31, 2011
MayTwoThousandSeventeenAuthorization [Member]        
Share Repurchases (Textual) [Abstract]        
Stock Repurchase Program     $ 2.0  
Treasury Stock, Shares, Acquired 145,917 113,484    
Stock Repurchase Program Remaining Authorized Repurchases Amount $ 1.3      
Treasury stock acquired volume weighted-average price $ 2.84 $ 2.99    
August 2011 authorization [Member]        
Share Repurchases (Textual) [Abstract]        
Stock Repurchase Program       $ 20.0
Stock Repurchase Program Remaining Authorized Repurchases Amount     $ 0.1  
Outside of Publically Announced Repurchase Program [Member]        
Share Repurchases (Textual) [Abstract]        
Treasury Stock, Shares, Acquired 58,993 39,269    
Treasury stock acquired volume weighted-average price $ 3.24 $ 2.91