Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Income from continuing operations	$ 30,581	$ (22,204)	$ 60,537	$ (92,295)
Loss from discontinued operations	(177)	(227)	(689)	(505)
Net (loss) income	30,404	(22,431)	59,848	(92,800)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	2,017	8,615	9,448	10,811
Provision for allowance for doubtful accounts	852	414	332	19
Inventory lower-of-cost-or-market/NRV adjustments	(163)	0	2,391	770
Stock-based compensation expense	1,172	6,262	3,734	619
Loss on asset dispositions	157	0	709	1,191
Loss on debt extinguishment	0	0	230	0
Loss on disposal group, goodwill and other intangible impairment charge	0	0	20,668	72,008
Loss on other investment in non-controlled affiliates impairment	0	0	2,500	0
Deferred income taxes, net of valuation allowances	312	(7,827)	(2,008)	(10,613)
Other	(619)	586	(832)	(90)
Changes in operating assets and liabilities:
Trade receivables	1,841	26,906	(41,565)	(8,790)
Inventories	(16,813)	(41,774)	(9,584)	13,237
Prepaids and other assets	(5,871)	7,993	(6,682)	3,012
Income taxes receivable	4,019	(7,672)	(3,550)	5,181
Trade payables	2,692	(44,159)	21,819	(13,451)
Accrued liabilities and other liabilities, including warranty obligations	4,807	6,521	14,202	(3,677)
Net cash (used in) provided by operating activities	24,807	(66,566)	71,660	(22,573)
Cash flows from investing activities:
Proceeds from sales and maturities of available-for-sale securities	0	73,448	0	25,271
Acquisition of business, net of cash acquired	(37,249)	(26,035)	(36,199)	0
Purchases of property, plant and equipment	(2,739)	(13,050)	(9,727)	(8,952)
Proceeds from the sale of disposal group	0	0	21,410	0
Net cash provided by (used in) investing activities	(39,988)	34,363	(24,516)	12,819
Cash flows from financing activities:
Proceeds from long-term debt	335	65,238	45,758	32,968
Payments on long-term debt	(327)	(49,930)	(45,101)	(50,667)
Payment of debt issuance costs	0	(577)	(1,842)	0
Payments on finance lease liabilities	0	(60)	0	0
Proceeds from employee stock purchases	103	486	256	241
Tax payments related to stock award issuances	0	479	51	75
Excess tax benefit related to stock-based awards	(2,160)	(2,920)	(2,240)	(107)
Net cash provided by (used in) financing activities	(2,049)	12,716	(3,118)	(17,490)
Effect of exchange rate changes	(910)	(2,195)	2,824	189
Net (decrease) increase in cash, cash equivalents and restricted cash	(18,140)	(21,682)	46,850	(27,055)
Cash and cash equivalents at beginning of period	57,920	39,780	11,070	38,125
Cash, cash equivalents and restricted cash at end of period	39,780	18,098	57,920	11,070
Supplemental disclosure of cash flow information:
Cash paid (received) for income taxes, net	(608)	13,983	17,300	(4,186)
Cash paid for interest	124	655	889	1,197
Capital expenditures incurred but not yet paid	534	1,077	908	420
Cash and cash equivalents	38,441	12,872	56,581
Restricted cash	1,339	1,339	1,339
Other current assets - restricted, current	0	3,887	0	0
Total cash, cash equivalents and restricted cash	39,780	18,098	57,920	11,070
Purchases of other investments in non-controlled affiliates	$ 0	$ 0	$ 0	$ (3,500)