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Consolidated Statement of Stockholders' (Deficit) Equity (USD $)
In Thousands, except Share data
Total
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interests [Member]
Class A Common Stock [Member]
Class B Common Stock [Member]
Balance at Apr. 30, 2011 $ 93,987 $ 285,992 $ (192,649) $ 378   $ 256 $ 10
Balance (in shares) at Apr. 30, 2011           25,589,000 988,000
Net loss (77,592)   (77,586)   (6)    
Other comprehensive income (2,330)     (2,330)      
Issuances of Class A common stock 239 235       4  
Issuances of Class A common stock, shares           402,000  
Stock-based compensation 1,855 1,855          
Contributions from noncontrolling interest holders 1,806       1,806    
Other 266 266          
Balance at Apr. 30, 2012 18,231 288,348 (270,235) (1,952) 1,800 260 10
Balance (in shares) at Apr. 30, 2012           25,991,000 988,000
Net loss (54,463)   (54,142)   (321)    
Other comprehensive income 1,360     1,360      
Issuances of Class A common stock 2,840 2,828       12  
Issuances of Class A common stock, shares           1,171,000  
Sale of Class A common stock, net 42,184 42,069       115  
Sale of Class A common stock, net (in shares)           11,500,000  
Stock-based compensation 2,516 2,516          
Contributions from noncontrolling interest holders 2,687       2,687    
Other 96 96          
Balance at Apr. 30, 2013 15,451 335,857 (324,377) (592) 4,166 387 10
Balance (in shares) at Apr. 30, 2013           38,662,000 988,000
Net loss (27,404)   (23,095)   (4,309)    
Other comprehensive income 631     631      
Issuances of Class A common stock 368 364       4  
Issuances of Class A common stock, shares           424,000  
Stock-based compensation 2,404 2,404          
Contributions from noncontrolling interest holders 13       13    
Balance at Apr. 30, 2014 $ (8,537) $ 338,625 $ (347,472) $ 39 $ (130) $ 391 $ 10
Balance (in shares) at Apr. 30, 2014           39,086,000 988,000