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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 11,512	$ 14,643	$ 31,556	$ 41,465
Cinema Equipment Business
Disaggregation of Revenue [Line Items]
Revenues	3,129	5,320	10,767	19,926
Content & Entertainment
Disaggregation of Revenue [Line Items]
Revenues	8,383	9,323	20,789	21,539
Phase I Deployment | Cinema Equipment Business
Disaggregation of Revenue [Line Items]
Revenues	1,402	2,156	4,797	7,424
Phase II Deployment | Cinema Equipment Business
Disaggregation of Revenue [Line Items]
Revenues	444	1,754	1,326	8,191
Services | Cinema Equipment Business
Disaggregation of Revenue [Line Items]
Revenues	1,043	1,410	3,378	4,311
Digital System Sales | Cinema Equipment Business
Disaggregation of Revenue [Line Items]
Revenues	240	0	1,266	0
Base Distribution Business | Content & Entertainment
Disaggregation of Revenue [Line Items]
Revenues	5,286	6,565	11,944	14,298
OTT Streaming and Digital | Content & Entertainment
Disaggregation of Revenue [Line Items]
Revenues	$ 3,097	$ 2,758	$ 8,845	$ 7,241

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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