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
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
May 17, 2017
Aug. 31, 2011
MayTwoThousandSeventeenAuthorization [Member]          
Share Repurchases (Textual) [Abstract]          
Stock Repurchase Program       $ 2.0  
Treasury Stock, Shares, Acquired 82,347 105,031      
Stock Repurchase Program Remaining Authorized Repurchases Amount $ 1.5        
Treasury stock acquired volume weighted-average price $ 2.85 $ 3.00      
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 51,210 21,267      
Treasury stock acquired volume weighted-average price $ 3.32 $ 2.78