SEGMENT INFORMATION - RECONCILIATION OF OPERATING PROFIT (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 11,512	$ 14,643	$ 31,556	$ 41,465
Direct operating (excludes depreciation and amortization shown below)	5,726	5,246	13,425	12,287
Selling, general and administrative	2,997	6,425	13,834	19,455
Allocation of corporate overhead	0	0	0	0
(Recovery) provision for doubtful accounts	(5)	113	321	1,245
Depreciation and amortization of property and equipment	1,594	2,074	4,977	6,239
Amortization of intangible assets	589	1,397	2,178	4,187
Total operating expenses	10,901	15,255	34,735	43,413
Income (loss) from operations	611	(612)	(3,179)	(1,948)
Cinema Equipment Business
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	3,129	5,320	10,767	19,926
Direct operating (excludes depreciation and amortization shown below)	312	505	908	1,227
Selling, general and administrative	536	448	1,636	1,446
Allocation of corporate overhead	200	378	605	1,167
(Recovery) provision for doubtful accounts	(5)	141	322	1,384
Depreciation and amortization of property and equipment	1,475	1,942	4,612	5,844
Amortization of intangible assets	11	11	34	34
Total operating expenses	2,529	3,425	8,117	11,102
Income (loss) from operations	600	1,895	2,650	8,824
Content & Entertainment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	8,383	9,323	20,789	21,539
Direct operating (excludes depreciation and amortization shown below)	5,414	4,741	12,517	11,060
Selling, general and administrative	2,294	3,499	8,109	11,219
Allocation of corporate overhead	1,249	989	3,785	3,042
(Recovery) provision for doubtful accounts	0	(28)	(1)	(139)
Depreciation and amortization of property and equipment	77	87	239	256
Amortization of intangible assets	576	1,385	2,140	4,149
Total operating expenses	9,610	10,673	26,789	29,587
Income (loss) from operations	(1,227)	(1,350)	(6,000)	(8,048)
Corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0	0
Direct operating (excludes depreciation and amortization shown below)	0	0	0	0
Selling, general and administrative	167	2,478	4,090	6,790
Allocation of corporate overhead	(1,449)	(1,367)	(4,390)	(4,209)
(Recovery) provision for doubtful accounts	0	0	0	0
Depreciation and amortization of property and equipment	42	45	126	139
Amortization of intangible assets	2	1	4	4
Total operating expenses	(1,238)	1,157	(170)	2,724
Income (loss) from operations	$ 1,238	$ (1,157)	$ 170	$ (2,724)