Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details Textual)

v3.7.0.1
Capital Stock and Stock Restrictions (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Apr. 30, 2017
Mar. 31, 2017
Mar. 31, 2016
May 26, 2017
May 12, 2017
Mar. 31, 2015
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   201,000 94,000        
Common Stock, Shares, Outstanding   48,060,172 47,184,725     46,839,000  
Class B Common Stock [Member]              
Class of Stock [Line Items]              
Common Stock, Shares, Outstanding   13,937,151 13,937,151     13,937,000  
August Two Thousand Eleven Authorization [Member] | Class A Common Stock [Member]              
Class of Stock [Line Items]              
Stock Repurchase Program, Remaining Authorized Repurchase Amount             $ 20.0
Treasury Stock, Shares, Acquired   0 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   201,643 93,903        
Treasury Stock Acquired, Average Cost Per Share   $ 0.81 $ 1.16        
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]              
Class of Stock [Line Items]              
Stock Repurchase Program, Remaining Authorized Repurchase Amount       $ 2.0      
Subsequent Event [Member] | Voting Trust [Member]              
Class of Stock [Line Items]              
Voting Control         49.80%    
Subsequent Event [Member] | Voting trust and other trusts [Member]              
Class of Stock [Line Items]              
Voting Control         53.80%    
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   1,881,505 1,502,500        
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 1,800,000