Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Stockholders' Equity (Unaudited) Statement

v3.10.0.1
Condensed Statements of Stockholders' Equity (Unaudited) Statement - 6 months ended Sep. 30, 2018 - USD ($)
$ in Thousands
Total
Common Stock [Member]
Common Class A [Member]
Common Stock [Member]
Common Class B [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Stockholders' Equity Attributable to Parent at Mar. 31, 2018 $ 52,295 $ 121 $ 35 $ 417,691 $ (35,907) $ (329,645)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Cumulative effect adjustment ASC 606 adoption | Accounting Standards Update 2014-09 [Member] 329         329
Net income (loss) (1,780)         (1,780)
Stock Issued During Period, Value, Share-based Compensation, Gross 0 3   (3)    
Treasury Stock, Value, Acquired, Cost Method (605) (2)     (603)  
Stock-based compensation 586     586    
Stockholders' Equity Attributable to Parent at Sep. 30, 2018 $ 50,825 $ 122 $ 35 $ 418,274 $ (36,510) $ (331,096)