Segment Information (Details) - Schedule of segment reporting, employee stock-based compensation expense - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	$ 946	$ 1,035	$ 1,929	$ 1,212
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	345	26	511	52
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total stock-based compensation	601	1,009	1,418	1,160
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	946	1,035	1,929	1,212
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	345	26	511	52
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	$ 601	$ 1,009	$ 1,418	$ 1,160