Segment Information (Details) - Schedule of segment reporting, employee stock-based compensation expense - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	$ 983	$ 177
Cinema Equipment Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation
Content & Entertainment Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	166	26
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	817	151
Direct operating [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation
Direct operating [Member] | Cinema Equipment Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation
Direct operating [Member] | Content & Entertainment Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation
Direct operating [Member] | Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation
Selling, general and administrative [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	983	177
Selling, general and administrative [Member] | Cinema Equipment Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation
Selling, general and administrative [Member] | Content & Entertainment Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	166	26
Selling, general and administrative [Member] | Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	$ 817	$ 151