RECENT BUSINESS ACQUISITION (Details) $ / shares in Units, £ in Millions						12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 23, 2021 USD ($) shares	Sep. 24, 2020 USD ($) shares	Sep. 24, 2020 GBP (£) shares	Apr. 17, 2020 USD ($) installment shares	Dec. 31, 2021 USD ($) D $ / shares shares	Dec. 31, 2020 USD ($) shares	Jul. 31, 2020 USD ($)
Business Acquisitions
Debt issued						$ 58,500,000
Note Payable					$ 350,000
Stock issued in connection with acquisition, value						403,000	$ 404,000
Revenue						185,177,000	54,891,000
Net loss						$ (13,802,000)	$ (16,152,000)
Number of shares for warrants | shares						2,043,291	295,000
Interactive Concepts BV
Business Acquisitions
Voting interests acquired (as a percent)		100.00%
Consideration amount		$ 3,300,000
Interactive Concepts BV | Class A common stock
Business Acquisitions
New issues (in shares) | shares		142,882			142,857
Sahara Presentation Systems PLC
Business Acquisitions
Voting interests acquired (as a percent)			100.00%	100.00%
Consideration amount			$ 94,900,000	£ 74.0		$ 94,900,000
Consideration paid in cash			$ 66,700,000	£ 52.0
Sahara Presentation Systems PLC | Series B Preferred Stock
Business Acquisitions
Stock issued in connection with acquisition (in shares) | shares			1,586,620	1,586,620
Stock issued in connection with acquisition, value			$ 16,500,000
Sahara Presentation Systems PLC | Series C Preferred Stock
Business Acquisitions
Stock issued in connection with acquisition (in shares) | shares			1,320,850	1,320,850
Stock issued in connection with acquisition, value			$ 12,400,000
Sahara Presentation Systems PLC | Series B and C Preferred Stock in aggregate
Business Acquisitions
Stock issued in connection with acquisition, value			$ 28,200,000	£ 22.0
MyStemKits, Inc.
Business Acquisitions
Consideration amount					$ 450,000
Consideration paid in cash					100,000
Working capital adjustments					150,000
Note Payable					$ 175,000			$ 175,000
Number of installments | installment					4
Periodic payment					$ 87,500
FrontRow Calypso, LLC
Business Acquisitions
Voting interests acquired (as a percent)						100.00%
Consideration paid in cash						$ 34,700,000
Whitehawk Inc [Member]
Business Acquisitions
Fees percentage						3.00%
Fees payable threshold amount						$ 1,800,000
Shares issued discount						$ 500,000
Whitehawk Inc [Member] | Class A common stock
Business Acquisitions
New issues (in shares) | shares						528,169
Number of shares for warrants | shares						2,043,291
Common stock exercise price for warrants issued | $ / shares						$ 2.00
Trading days for warrant repricing | D						30
Share price | $ / shares						$ 2.00
Whitehawk Inc [Member] | Initial Term Loan
Business Acquisitions
Debt issued						$ 58,500,000
Whitehawk Inc [Member] | Initial Term Loan | Class A common stock
Business Acquisitions
Periodic payment	$ 625,000