Summary of Significant Accounting Policies (Details) - Schedule of disaggregation of revenue - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Cinema Equipment Business [Member]
Cinema Equipment Business:
Total Cinema Equipment Business revenue	$ 910	$ 3,129	$ 2,158	$ 10,767
Content & Entertainment Business [Member]
Content & Entertainment Business:
Total Content & Entertainment Business revenue	9,044	8,383	20,996	20,789
Phase I Deployment [Member] | Cinema Equipment Business [Member]
Cinema Equipment Business:
Total Cinema Equipment Business revenue	281	1,402	424	4,797
Phase II Deployment [Member] | Cinema Equipment Business [Member]
Cinema Equipment Business:
Total Cinema Equipment Business revenue	367	444	1,067	1,326
Services [Member] | Cinema Equipment Business [Member]
Cinema Equipment Business:
Total Cinema Equipment Business revenue	196	1,043	481	3,378
Digital System Sales [Member] | Cinema Equipment Business [Member]
Cinema Equipment Business:
Total Cinema Equipment Business revenue	66	240	186	1,266
Base Distribution Business [Member] | Content & Entertainment Business [Member]
Content & Entertainment Business:
Total Content & Entertainment Business revenue	4,152	5,286	9,218	11,944
OTT Streaming and Digital [Member] | Content & Entertainment Business [Member]
Content & Entertainment Business:
Total Content & Entertainment Business revenue	$ 4,892	$ 3,097	$ 11,778	$ 8,845