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NATURE OF OPERATIONS - NARRATIVE (Details)
 1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended
Nov. 07, 2017
USD ($)
Nov. 01, 2017
USD ($)
shares
May 31, 2016
Nov. 16, 2017
USD ($)
Sep. 30, 2017
USD ($)
theatre
shares
Nov. 01, 2017
USD ($)
shares
Jun. 27, 2017
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of movie theatres | theatre         12,000      
Accumulated deficit         $ (373,193,000)     $ (360,415,000)
Converted instrument, shares issued (in shares) | shares         1,315,326      
Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Proceeds from issuance of common stock   $ 30,000,000            
Phase I Deployment, Phase II Development, and Services Segment                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Notes payable, net         $ 48,800,000      
Content and Entertainment and Corporate Segments                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Notes payable, net         74,600,000      
Content and Entertainment and Corporate Segments | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Extinguishment of debt, amount       $ 46,800,000        
Convertible Debt                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Extinguishment of debt, amount         $ 3,800,000      
Convertible Debt | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Proceeds from issuance of common stock   30,000,000            
Extinguishment of debt, amount   46,300,000       $ 50,100,000    
Repayments of convertible debt $ 500,000 $ 17,100,000       $ 17,100,000    
Converted instrument, shares issued (in shares) | shares   2,221,457       3,536,783    
5.5% Convertible Notes Due 2035 | Recourse Notes Payable                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Debt interest rate, stated rate         5.50%     5.50%
Percent of principal amount held by debt holders         99.00%      
Second Lien Loans                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Debt face amount         $ 1,500,000.0      
Second Lien Loans | Convertible Debt | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Extinguishment of debt, amount           $ 1,500,000    
Class A common stock                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Stock split, conversion ratio     0.1          
Number of shares authorized for sale (in shares) | shares             20,000,000  
Par value per share (in dollars per share) | $ / shares             $ 0.001  
Maximum proceeds from sale of stock             $ 30,000,000  
Maximum number of shares to be sold to management (in shares) | shares             400,000  
Class A common stock | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of shares issued in transaction (in shares) | shares   20,000,000            
Class A common stock | Convertible Debt | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of shares issued in transaction (in shares) | shares   20,000,000            
Strategic Partner | Class A common stock | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of shares issued in transaction (in shares) | shares   19,666,667            
Strategic Partner | Class A common stock | Convertible Debt | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of shares issued in transaction (in shares) | shares   19,666,667            
Chief Executive Officer | Class A common stock | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of shares issued in transaction (in shares) | shares   333,333            
Chief Executive Officer | Class A common stock | Convertible Debt | Subsequent Event                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Number of shares issued in transaction (in shares) | shares   333,333