Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Stockholders' Equity (Unaudited) Statement

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Condensed Statements of Stockholders' Equity (Unaudited) Statement - 6 months ended Sep. 30, 2017 - 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]
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Retained Earnings [Member]
Stockholders' Equity Attributable to Parent at Mar. 31, 2017 $ 52,174 $ 120 [1] $ 35 [1] $ 416,422 [1] $ (35,335) $ 608 $ (329,676)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 148           148
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax [2] (608)         (608)  
Stock Issued During Period, Value, Share-based Compensation, Gross 1 2   (1)      
Treasury Stock, Value, Acquired, Cost Method (456) (1)     (455)    
Stock-based compensation 672     672      
Stockholders' Equity Attributable to Parent at Sep. 30, 2017 $ 51,931 $ 121 $ 35 $ 417,093 $ (35,790) $ 0 $ (329,528)
[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.
[2] During the quarter ended September 30, 2017, the Company dissolved the NoranTel legal entity, which triggered a one-time foreign currency gain with the reversal of a cumulative translation adjustment. See Note 1.