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STOCK-BASED COMPENSATION PLANS - Stock Plan (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Outstanding Number of Options (in shares) | shares	765
Weighted average Remaining Contractual Life (years)	4 years 8 months 4 days
Weighted average Outstanding Strike Price	$ 1.36
Exercisable Number of Options (in shares) | shares	670
Remaining Exercisable Contractual Life (years)	4 years 3 months 29 days
Weighted Average Exercisable Strike Price	$ 0.99
$0 to $2.00
Exercise Price Minimum	0
Exercise Price Maximum	$ 2.00
Outstanding Number of Options (in shares) | shares	495
Weighted average Remaining Contractual Life (years)	3 years 6 months 14 days
Weighted average Outstanding Strike Price	$ 0.31
Exercisable Number of Options (in shares) | shares	495
Remaining Exercisable Contractual Life (years)	3 years 6 months 14 days
Weighted Average Exercisable Strike Price	$ 0.31
$2.01 to $4.00
Exercise Price Minimum	2.01
Exercise Price Maximum	$ 4.00
Outstanding Number of Options (in shares) | shares	244
Weighted average Remaining Contractual Life (years)	6 years 7 months 24 days
Weighted average Outstanding Strike Price	$ 2.72
Exercisable Number of Options (in shares) | shares	167
Remaining Exercisable Contractual Life (years)	6 years 5 months 23 days
Weighted Average Exercisable Strike Price	$ 2.62
$4.01 to $10.00
Exercise Price Minimum	4.01
Exercise Price Maximum	$ 10.00
Outstanding Number of Options (in shares) | shares	26
Weighted average Remaining Contractual Life (years)	7 years 11 months 1 day
Weighted average Outstanding Strike Price	$ 8.51
Exercisable Number of Options (in shares) | shares	8
Remaining Exercisable Contractual Life (years)	7 years 9 months 25 days
Weighted Average Exercisable Strike Price	$ 8.21

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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