INCOME TAXES - EFFECTIVE INCOME TAX RECONCILIATION (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Statutory federal tax rate	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	3.00%	(4.00%)	9.00%
Foreign income inclusion	0.00%	(12.00%)	0.00%
Non-temporary stock option benefit	49.00%	6.00%	(48.00%)
Meals and entertainment permanent difference	0.00%	0.00%	(2.00%)
GILTI permanent difference	0	0	0.02
Other permanent differences	0.00%	1.00%	(1.00%)
Foreign tax rate differences	10.00%	2.00%	6.00%
Change in tax rate	8.00%	1.00%	(6.00%)
Change in valuation allowance	88.00%	(4.00%)	(17.00%)
Other deferred differences	(25.00%)	(2.00%)	(9.00%)
Transaction costs	(4.00%)	(6.00%)	(6.00%)
Executive compensation limitation	(65.00%)	(6.00%)	(7.00%)
Research & development credit	(1.00%)	2.00%	20.00%
Equity Investment	(8.00%)	(4.00%)	0.00%
Change in uncertain tax benefits	11.00%	3.00%	0.00%
Contingent Consideration	10.00%	0.00%	0.00%
Other Foreign Income Taxes Due	(2.00%)	0.00%	0.00%
Other	1.00%	(1.00%)	0.00%
Effective income tax rate	104.00%	(2.00%)	56.00%
Optomed
Income Tax Contingency [Line Items]
Non-consolidated Investment Income	8.00%	1.00%	(2.00%)

Effective Income Tax Rate Reconciliation, Equity Method Investment

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Effective Income Tax Rate Reconciliation, Executive Compensation Limit, Percent

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Effective Income Tax Rate Reconciliation, Foreign Income Inclusion, Percent

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Effective Income Tax Rate Reconciliation, Other Deferred Differences, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act.

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