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NATURE OF OPERATIONS (Details) |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |
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Jun. 26, 2020 USD ($) | Jun. 24, 2020 USD ($) $ / shares shares | May 20, 2020 USD ($) $ / shares shares | Apr. 15, 2020 USD ($) | Feb. 13, 2020 shares | Aug. 02, 2019 USD ($) $ / shares shares | Jul. 09, 2019 USD ($) $ / shares shares | Oct. 09, 2018 USD ($) | Mar. 31, 2020 USD ($) theatre shares | Mar. 31, 2019 USD ($) | Jun. 29, 2020 USD ($) | Apr. 10, 2020 counterparty shares | Feb. 14, 2020 USD ($) | Dec. 31, 2019 $ / shares | Dec. 27, 2019 shares | Jul. 12, 2019 USD ($) | Jul. 03, 2019 USD ($) | Aug. 09, 2018 USD ($) | Jul. 20, 2018 USD ($) | Jul. 14, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Quoted Market Value |  |  |  |  |  |  |  |  | $ 23,400,000 |  |  |  | $ 25,100,000 |  |  |  |  |  |  |
Number Of Movie Theatres | theatre |  |  |  |  |  |  |  |  | 12,000 |  |  |  |  |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) |  |  |  |  |  |  |  |  | $ (410,904,000) | $ (395,814,000) |  |  |  |  |  |  |  |  |  |
Working Capital |  |  |  |  |  |  |  |  | (67,000,000) |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.001 |  |  |  |  |  |
Number of shares issued (in shares) | shares |  |  |  |  |  | 1,900,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of Stock, Consideration Received on Transaction |  |  |  |  |  | $ 2,900,000 | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares |  |  |  |  |  | $ 1.50 | $ 1.50 |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from issuance of Class A common stock |  |  |  |  |  |  |  |  | 5,850,000 | $ 0 |  |  |  |  |  |  |  |  |  |
Number of shares to be purchased (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 410,901,000 |  |  |  |  |
Business Combination, Number of Shares Acquired | shares |  |  |  |  | 162,162,162 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares |  |  |  |  | 21,646,604 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepaid Expense to Terminate Acquisition Agreement |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Bison Note Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt amount, at issuance |  |  |  |  |  |  |  |  | $ 10,000,000.0 |  |  |  |  |  |  |  |  |  | $ 10,000,000.0 |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |
Convertible Notes | Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt amount, at issuance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000.0 |  | $ 5,000,000 |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  | 8.00% |  |
Second Secured Lien Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.75%
Second Secured Lien Notes | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt amount, at issuance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,000,000
Stock Issued During Period, Shares, Issued for Financing | shares |  |  |  |  |  |  |  |  | 906,450 |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  |  |  | $ 5,000,000 | $ 3,400,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.50%
Credit Facility | Recourse Notes Payable [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,000,000 |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized Remaining, Value |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |
Equity Method Investment, Quoted Market Value | $ 35,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) | shares |  |  | 10,666,666 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares |  |  | $ 0.75 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from issuance of Class A common stock |  |  | $ 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock, net |  |  | $ 7,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares to be purchased (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 223,380,000 |  |  |  |  |  |  |  |
Shares reserved for future issuance (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 29,855,081 |  |  |  |  |  |  |  |
Number of counterparties | counterparty |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |
Subsequent Event | Paycheck Protection Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Second Lien Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt amount, at issuance |  | $ 842,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Financing | shares |  | 329,501 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments of Debt Restructuring Costs | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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