Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details Textual)

v3.8.0.1
Capital Stock and Stock Restrictions (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Apr. 30, 2018
Mar. 31, 2018
Mar. 31, 2017
May 14, 2018
May 17, 2017
Mar. 31, 2016
Aug. 31, 2011
Class of Stock [Line Items]              
Stock Repurchase Program Remaining Authorized Repurchases Amount   $ 1.7          
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   193,000 50,000        
Common Stock, Shares, Outstanding   12,145,743 12,015,043 [1]     11,796,000  
Class B Common Stock [Member]              
Class of Stock [Line Items]              
Common Stock, Shares, Outstanding   3,484,287 3,484,287 [1]     3,484,000  
2017 authorization [Member] | Class A Common Stock [Member]              
Class of Stock [Line Items]              
Stock Repurchase Program, Remaining Authorized Repurchase Amount         $ 2.0    
Treasury Stock, Shares, Acquired   133,608          
Treasury Stock Acquired, Average Cost Per Share   $ 2.98          
2011 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        
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   193,271 50,410        
Treasury Stock Acquired, Average Cost Per Share   $ 2.96 $ 3.24        
Voting trust and other trusts [Member] | Class B Common Stock [Member]              
Class of Stock [Line Items]              
Common Stock, Shares, Outstanding   3,484,287          
Subsequent Event [Member] | Voting Trust [Member]              
Class of Stock [Line Items]              
Voting Control       49.60%      
Subsequent Event [Member] | Voting trust and other trusts [Member]              
Class of Stock [Line Items]              
Voting Control       53.50%      
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   570,000 470,376        
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 300,000            
[1] All common stock (except authorized shares), equity share, and per share amounts have been retroactively adjusted to reflect a one-for-four reverse stock split, which was effective June 7, 2017.