SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Revenue, Initial Application Period Cumulative Effect Transition (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenues	$ 119,064	$ 101,640	$ 94,876	$ 94,364	$ 104,301	$ 90,431	$ 79,281	$ 86,453	$ 409,944	$ 360,466	$ 411,788
Accounts Receivable, after Allowance for Credit Loss, Current	77,046				78,614				77,046	78,614
Inventory, Net	(19,922)				(26,568)				(19,922)	(26,568)
Other Assets, Noncurrent	13,454				5,958				13,454	5,958
Assets	274,000				305,138				274,000	305,138
Accrued Liabilities, Current	37,552				42,264				37,552	42,264
Deferred Revenue, Current	(87,475)				(87,974)				(87,475)	(87,974)
Deferred Revenue, Noncurrent	(10,607)				(11,284)				(10,607)	(11,284)
Liabilities	(398,074)				(438,062)				(398,074)	(438,062)
Retained Earnings (Accumulated Deficit)	(1,126,959)				(1,168,347)				(1,126,959)	(1,168,347)
Stockholders' Equity Attributable to Parent	(124,074)				(132,924)				(124,074)	(132,924)
Cost of Revenue									144,140	132,146	162,713
Gross profit	78,347	65,903	60,138	61,416	65,350	58,257	51,562	53,151	265,804	228,320	249,075
Marketing and selling	28,983	24,413	21,354	20,744	22,660	19,998	19,690	25,289	95,494	87,637	99,944
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	15,951	15,766	7,365	4,873	6,913	8,694	2,562	(5,735)	43,955	12,434	2,525
Net (loss) income	$ 15,216	$ 14,775	$ 7,006	$ 4,391	$ 7,087	$ 7,987	$ 1,845	$ (5,857)	$ 41,388	$ 11,062	$ 7,601