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Related Party Transactions - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Apr. 30, 2016
Mar. 31, 2016
Jun. 19, 2016
Apr. 29, 2016
Mar. 31, 2015
Jul. 09, 2014
Aug. 31, 2012
Mar. 02, 2010
Related Party Transaction [Line Items]                
Extraordinary dividend declared               $ 1.10
Company's assertion as to the percent of the dividend that is taxable to the recipient               4.90%
Internal Revenue Service's assertion as to the percent of the dividend that is taxable to the recipient, which the company is refuting             100.00%  
Restricted cash   $ 500,000     $ 500,000      
Estimated additional taxes, penalties and interest   5,000,000            
Accrued consulting fees and reimbursable expenses   $ 12,000            
Mr. Will | Subsequent Event                
Related Party Transaction [Line Items]                
Consulting fee paid $ 12,000              
Grande                
Related Party Transaction [Line Items]                
Grande's (Provisional Liquidator Appointed) Ownership Interest in Emerson number of shares           15,243,283    
Grande's (Provisional Liquidator Appointed) Ownership Interest Percentage           56.20%    
Grande | Mr. Ho | Subsequent Event                
Related Party Transaction [Line Items]                
Grande's (Provisional Liquidator Appointed) Ownership Interest Percentage     72.30%          
S&T | Subsequent Event                
Related Party Transaction [Line Items]                
Release of collateral, net of expenses incurred       $ 421,000        
S&T | Subsequent Event | IRS                
Related Party Transaction [Line Items]                
Expenses incurred in defending IRS challenge $ 79,000