SEGMENT INFORMATION - EMPLOYEE STOCK-BASED COMPENSATION EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	$ 11	$ 86
Direct operating
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	0	0
Selling, general and administrative
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	11	86
Cinema Equipment Business
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	2	0
Cinema Equipment Business | Direct operating
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	0	0
Cinema Equipment Business | Selling, general and administrative
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	2	0
Content & Entertainment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	4	0
Content & Entertainment | Direct operating
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	0	0
Content & Entertainment | Selling, general and administrative
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	4	0
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	5	86
Corporate | Direct operating
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	0	0
Corporate | Selling, general and administrative
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total stock-based compensation	$ 5	$ 86