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