Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details Textual)

Capital Stock and Stock Restrictions (Details Textual) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2016	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	May. 13, 2016	Mar. 31, 2013	Aug. 29, 2011
Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized		1,000,000	1,000,000
Class A Common Stock [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired		94,000	336,000	162,000
Common Stock, Shares, Outstanding		47,184,725	46,839,361	45,853,000		44,970,000
Class B Common Stock [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding		13,937,151	13,937,151	13,937,000		13,937,000
August Two Thousand Eleven Authorization [Member] \| Class A Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount							$ 20.0
Stock Repurchase Program Remaining Authorized Repurchases Amount		$ 0.1
Outside of Publically Announced Repurchase Program [Member] \| Class A Common Stock [Member]
Class of Stock [Line Items]
Shares Paid for Tax Withholding for Share Based Compensation		93,903	335,890	161,699
Treasury Stock Acquired, Average Cost Per Share		$ 1.16	$ 2.57	$ 2.22
Voting trust and other trusts [Member] \| Class B Common Stock [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding		13,937,150
Subsequent Event [Member] \| Voting Trust [Member]
Class of Stock [Line Items]
Voting Control					50.30%
Subsequent Event [Member] \| Voting trust and other trusts [Member]
Class of Stock [Line Items]
Voting Control					54.20%
Stock Options [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		1,567,500
Stock Options [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	1,300,000
Restricted Stock Units (RSUs) [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		1,502,500	780,500	1,182,000
Restricted Stock Units (RSUs) [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,300,000