NOTES PAYABLE - NARRATIVE (Details)											1 Months Ended				3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 30, 2018 USD ($) extension	Jul. 10, 2017 USD ($)	Jul. 01, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 22, 2016 $ / shares	Jul. 14, 2016 USD ($) shares	Apr. 29, 2015 USD ($) $ / shares shares	Oct. 17, 2013 USD ($)	Feb. 28, 2013 USD ($)	Feb. 28, 2013 USD ($)	Feb. 28, 2017 shares	Jul. 31, 2016 USD ($)	Apr. 30, 2015 USD ($)	Oct. 31, 2013 USD ($) shares	Dec. 31, 2017 USD ($) shares	Mar. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2018 USD ($) tranche $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares	Dec. 29, 2017 USD ($) shares	Jun. 30, 2016 USD ($)	May 31, 2016 USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate								4.00%
Proceeds from issuance of notes payable																$ 5,525,000			$ 10,000,000
Restricted cash																1,000,000			1,000,000	$ 1,000,000
Induced Conversion of Convertible Debt Expense
Common stock issued in connection with induced conversion of Convertible Notes																			34,288,000	14,280,000
Debt Conversion, Converted Instrument, Shares Issued | shares															3,536,783
Re-issuance of treasury stock in connection with convertible notes exchange transaction (in shares) | shares											277,244
Debt conversion expense and loss on extinguishment of notes payable																(5,415,000)			(4,504,000)
Payment for Debt Extinguishment or Debt Prepayment Cost																	$ 17,600,000
Issuance of shares for CEO retention bonus																				250,000
Issuance of warrants in connection with debt instruments																			1,084,000	0
Debt conversion expense and loss on extinguishment of notes payable																(5,415,000)	(4,500,000)		(4,504,000)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term Line of Credit																$ 8,634,000			154,000	$ 8,634,000
Line of Credit Facility, Maximum Borrowing Capacity																			$ 40,211,000
Class A common stock
Line of Credit Facility [Line Items]
Common stock, par value (in dollars per share) | $ / shares																$ 0.001			$ 0.001	$ 0.001
Long-term Debt | Class A common stock
Line of Credit Facility [Line Items]
Treasury Stock, Shares, Acquired | shares							272,100
Treasury Stock, Value, Acquired, Cost Method							$ 2,700,000
Forward Contracts [Member] | Class A common stock
Line of Credit Facility [Line Items]
Adjustments to Additional Paid in Capital, Forward Contract Indexed							11,400,000
Forward Contracts Indexed to Issuer's Equity, Indexed Shares | shares																1,179,138			1,179,138	1,179,138
Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt Conversion, Converted Instrument, Shares Issued | shares																			3,536,783
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity																$ 0				$ 0
Recourse Notes Payable [Member]
Line of Credit Facility [Line Items]
Long Term Portion, Gross																64,736,000			$ 28,787,000	64,736,000
2013 Prospect Term Loan Agreement
Line of Credit Facility [Line Items]
Restricted Funds dedicated to 2010 Term Loans Credit Agreement
Restricted cash																1,000,000			$ 1,000,000	1,000,000
LIBOR | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate																			2.32%
East West Loan Agreement [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Proceeds from issuance of notes payable	$ 8,200,000
Line of Credit Facility, Maximum Borrowing Capacity																			$ 19,000,000
Debt Instrument, Number of One-Year Extensions | extension	2
Line of Credit Facility, Remaining Borrowing Capacity																			9,800,000
East West Loan Agreement [Member] | LIBOR | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.25%
East West Loan Agreement [Member] | Prime Rate [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Loan Agreement [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Proceeds from Secured Notes Payable																			10,500,000
Credit Agreement Amendment Number 4 [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity												$ 19,800,000										$ 22,000,000
Minimum liquidity			$ 5,000,000	$ 800,000
Credit Agreement Amendment Number 4 [Member] | Base Rate | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate												3.50%
Credit Agreement Amendment Number 4 [Member] | Eurodollar [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate												4.50%
2013 Term Loans
Line of Credit Facility [Line Items]
Debt amount, at issuance									$ 130,000,000	$ 130,000,000
Debt principal balance assigned to affiliate									$ 5,000,000	$ 5,000,000
Debt conversion expense and loss on extinguishment of notes payable																			700,000
2013 Term Loans | LIBOR
Line of Credit Facility [Line Items]
Debt Instrument, Variable Rate Basis, Floor									1.00%	1.00%
Debt Instrument, Basis Spread on Variable Rate									2.75%
2013 Term Loans | Base Rate
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate									1.75%
Convertible Notes | Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance							$ 64,000,000
Interest rate, stated percentage							5.50%
Debt Instrument, Convertible, Conversion Ratio, Denominator							$ 1,000
Convertible notes, conversion ratio (shares)							82.4572
Convertible debt, conversion price per share (usd per share) | $ / shares							$ 12.13
Debt Instrument, Convertible, Repurchase Price, Percentage							100.00%
Convertible notes, repurchase price, percentage, at option of holder (percent)							100.00%
Proceeds from Convertible Debt							$ 60,900,000
Interest Expense, Debt																			3,400,000	3,200,000
Long-term Debt, Percent of Total Outstanding		99.00%
Cinedigm Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 55,000,000
Cinedigm Credit Agreement [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Repayments of Debt							18,600,000
Debt Instrument, Repurchased Face Amount							$ 18,200,000
Cinedigm Credit Agreement [Member] | Eurodollar [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate								4.00%
Cinedigm Credit Agreement [Member] | Federal Funds Effective Swap Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate								0.50%
Debt Instrument, Variable Rate, Basis Percentage of Nations Largest Banks								75.00%
Cinedigm Term Loan [Member] | Term Loans [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 25,000,000
Cinedigm Revolving Loans [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Repayments of Long-term Lines of Credit	$ 7,800,000
Line of Credit Facility, Maximum Borrowing Capacity								$ 30,000,000.0
Cinedigm Revolving Loans [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity																0				0
Minimum liquidity													$ 5,000,000.0
Cinedigm Revolving Loans [Member] | Recourse Notes Payable [Member]
Line of Credit Facility [Line Items]
Long Term Portion, Gross																0			0	0
Cinedigm Revolving Loans [Member] | LIBOR | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Variable Rate Basis, Floor													1.00%
Cinedigm Revolving Loans [Member] | Base Rate | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate													3.00%
Debt Instrument, Variable Rate Basis Percent								6.25%
Cinedigm Revolving Loans [Member] | Eurodollar [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate													4.00%
Debt Instrument, Variable Rate Basis Percent								1.00%
Bison Note Payable
Line of Credit Facility [Line Items]
Debt amount, at issuance																					$ 10,000,000.0
Interest rate, stated percentage																					5.00%
Long Term Portion, Gross																0			10,000,000	0
Outstanding warrants | shares																					1,400,000
Cinedigm Revolving Loans, May 2016 Amendment [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity																							$ 22,000,000.0
Cinedigm Term Loans | Base Rate | Term Loans [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate								5.00%
Cinedigm Term Loans | Eurodollar [Member] | Term Loans [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate								6.00%
Notes 2013 Due 2018 | Recourse Notes Payable [Member]
Line of Credit Facility [Line Items]
Long Term Portion, Gross																5,000,000			0	5,000,000
Notes 2013 Due 2018 | Senior Notes
Line of Credit Facility [Line Items]
Interest rate, stated percentage														9.00%
Debt Conversion, Original Debt, Amount														$ 5,000,000
Number of securities called by warrants | shares														150,000
Debt Instrument, Unamortized Discount														$ 1,600,000
2013 Prospect Term Loan Agreement
Line of Credit Facility [Line Items]
Debt amount, at issuance									$ 70,000,000	$ 70,000,000						70,000,000			$ 70,000,000	70,000,000
Debt Instrument, Basis Spread on Variable Rate										9.00%
Interest rate, stated percentage									2.50%	2.50%
Annual threshold of financial support guaranteed by Company towards the 2013 Prospect Loan									$ 1,500,000
2013 Prospect Term Loan Agreement | Debt Instrument, Prepayment Period - Between Second And Third Anniversary
Line of Credit Facility [Line Items]
Debt Instrument, Prepayment Premium									5.00%	5.00%
2013 Prospect Term Loan Agreement | Debt Instrument, Prepayment Period - Between Third and Fourth Anniversary
Line of Credit Facility [Line Items]
Debt Instrument, Prepayment Premium									4.00%	4.00%
2013 Prospect Term Loan Agreement | Debt Instrument, Prepayment Period - Between Fourth and Fifth Anniversary
Line of Credit Facility [Line Items]
Debt Instrument, Prepayment Premium									3.00%	3.00%
2013 Prospect Term Loan Agreement | Debt Instrument, Prepayment Period - Between Fifth and Sixth Anniversary
Line of Credit Facility [Line Items]
Debt Instrument, Prepayment Premium									2.00%	2.00%
2013 Prospect Term Loan Agreement | Debt Instrument, Prepayment Period - Between Sixth and Seventh Anniversary
Line of Credit Facility [Line Items]
Debt Instrument, Prepayment Premium									1.00%	1.00%
2013 Prospect Term Loan Agreement | LIBOR
Line of Credit Facility [Line Items]
Debt Instrument, Variable Rate Basis, Floor									2.00%	2.00%
KBC Credit Facility 3 [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term Line of Credit																3,758,000				3,758,000
Interest rate, stated percentage																			3.75%
Line of Credit Facility, Maximum Borrowing Capacity																			$ 22,336,000
KBC Credit Facility 5 [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term Line of Credit																3,264,000			$ 154,000	3,264,000
Interest rate, stated percentage																			3.75%
Line of Credit Facility, Maximum Borrowing Capacity																			$ 11,425,000
KBC Credit Facility 6 [Member] | Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term Line of Credit																1,612,000			$ 0	1,612,000
Interest rate, stated percentage																			3.75%
Line of Credit Facility, Maximum Borrowing Capacity																			$ 6,450,000
Exchange Agreement [Member] | Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Repurchased Face Amount																13,400,000			13,400,000	13,400,000
Debt Issuance Costs, Net																			$ 400,000
Re-issuance of treasury stock in connection with convertible notes exchange transaction (in shares) | shares																			277,244
Debt Conversion, Converted Instrument, Warrants or Options Issued | shares																			200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares					$ 1.60
Class of Warrant or Right, Vesting Period					6 months
Class of Warrant or Right, Contractual Term					5 years
Exchange Agreement [Member] | Convertible Debt [Member] | Class A common stock
Line of Credit Facility [Line Items]
Debt Conversion, Converted Instrument, Shares Issued | shares																			1,575,000
Common stock, par value (in dollars per share) | $ / shares					$ 0.001
Debt Conversion, Original Debt, Amount		$ 50,600,000
Exchange Agreement [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance																			$ 3,500,000
Second Lien Loans [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance															$ 1,500,000.0		$ 1,500,000.0
Second Secured Lien Notes [Member]
Line of Credit Facility [Line Items]
Interest rate, stated percentage						12.75%
Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Number of securities called by warrants | shares																			100,000
Class of Warrant or Right, Number of Tranches | tranche																			2
Issuance of shares for CEO retention bonus																		$ 1,200,000
Issuance of warrants in connection with debt instruments																		$ 100,000
Second Secured Lien Notes [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance						$ 15,000,000													$ 10,500,000
Interest rate, stated percentage						7.50%
Long Term Portion, Gross																$ 9,165,000			$ 10,560,000	9,165,000
Debt Instrument, Number of Shares to be Issued for Every 1 Million Borrowed | shares						98,000
Issuance of common stock in connection with Second Secured Lien Notes (in shares) | shares																			906,450
Proceeds from Secured Notes Payable																			$ 1,500,000
Second Secured Lien Notes [Member] | Secured Debt [Member] | Class A common stock
Line of Credit Facility [Line Items]
Debt Instrument, Number of Shares to be Issued for Every 1 Million Borrowed | shares						98,000
Second Secured Lien Notes [Member] | Payment in Kind (PIK) Note [Member]
Line of Credit Facility [Line Items]
Interest rate, stated percentage						5.25%
12.75% Loans Due 2019 [Member]
Line of Credit Facility [Line Items]
Interest rate, stated percentage						12.75%
12.75% Loans Due 2019 [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Interest rate, stated percentage						7.50%
12.75% Loans Due 2019 [Member] | Payment in Kind (PIK) Note [Member]
Line of Credit Facility [Line Items]
Interest rate, stated percentage						5.25%
Additional Paid-in Capital [Member]
Line of Credit Facility [Line Items]
Common stock issued in connection with induced conversion of Convertible Notes																			$ 34,285,000	14,279,000
Issuance of shares for CEO retention bonus																				$ 250,000
Warrant [Member]
Line of Credit Facility [Line Items]
Expected life (years)																			7 years
Risk free interest rate																			1.20%
Expected volatility																			73.30%
Third-Party Lenders [Member] | Second Secured Lien Notes [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance																			$ 4,500,000
Ronald L. Chez [Member] | Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Issuance of common stock to Board of Directors (in shares) | shares																			597,100
Ronald L. Chez [Member] | Second Secured Lien Notes [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance																			$ 4,000,000
Chairman of the Board of Directors and Chief Executive Officer [Member] | Second Secured Lien Notes [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Debt amount, at issuance																			$ 500,000
Mr. McGurk [Member] | Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Issuance of common stock to Board of Directors (in shares) | shares																			49,000
Board of Director Member [Member] | Notes 2013 Due 2018 | Senior Notes
Line of Credit Facility [Line Items]
Debt Conversion, Original Debt, Amount														$ 500,000
Board of Director Member [Member] | Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Issuance of common stock to Board of Directors (in shares) | shares																			4,900
Third-Party Lenders [Member] | Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Issuance of common stock to Board of Directors (in shares) | shares																			100,450
Class or Warrant or Right, Tranche One [Member] | Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares																			$ 1.34
Second Secured Lien Notes [Member]
Line of Credit Facility [Line Items]
Outstanding warrants | shares																			206,768
Class of Warrant or Right, Tranche Two [Member] | Second Secured Lien Notes [Member] | Class A common stock
Line of Credit Facility [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares																			$ 1.68