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ACQUISITIONS - Consideration Transferred (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 01, 2021	Dec. 31, 2021	Dec. 31, 2020
TEGAM, Inc. [Member]
Business Acquisition [Line Items]
Cash paid for acquisition	$ 15,430
Holdback	1,800
Total fair value of consideration transferred	17,230
Less cash acquired	(177)
Total purchase price	$ 17,053
Acquired percentage	100.00%
Versatile Power, Inc. [Member]
Business Acquisition [Line Items]
Cash paid for acquisition		$ 4,654
Holdback		950
Total fair value of consideration transferred		5,604
Less cash acquired		(245)
Total purchase price		$ 5,359	$ 5,359
Acquired percentage			100.00%

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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