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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - REVENUE BY CATEGORY (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2020 | Mar. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues | $ 7,735 | $ 39,291 | $ 53,534
Cinema Equipment Business |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues | 1,974 | 12,741 | 26,199
Cinema Equipment Business | Phase I Deployment [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues |  | 5,476 | 9,302
Cinema Equipment Business | Phase II Deployment [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues |  | 1,717 | 8,651
Cinema Equipment Business | Services [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues |  | 4,122 | 5,487
Cinema Equipment Business | Digital System Sales [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues |  | 1,426 | 2,759
Content & Entertainment |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues | $ 5,761 | 26,550 | 27,335
Content & Entertainment | Base Distribution Business [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues |  | 19,222 | 17,639
Content & Entertainment | OTT Streaming and Digital [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenues |  | $ 7,328 | $ 9,696

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- Definition 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 + Details
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