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Stockholder's Equity - Cumulative Convertible Preferred Stock (Detail)
Dec. 31, 2013
Dec. 31, 2012
Convertible Preferred Stock [Line Items]    
Shares issued and outstanding 30,000 108,000
Common shares resulting if converted 100,000 488,000
Series A [Member]
    
Convertible Preferred Stock [Line Items]    
Shares issued and outstanding 20,000 20,000
Conversion factor 2.50 2.50
Common shares resulting if converted 50,000 50,000
Series M [Member]
    
Convertible Preferred Stock [Line Items]    
Shares issued and outstanding 10,000 88,000
Conversion factor 5.00 5.00
Common shares resulting if converted 50,000 438,000