CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (136,450)	$ (33,915)
Income from discontinued operations, net of tax	0	42,158
Loss from continuing operations, net of tax	(136,450)	(76,073)
Adjustments to reconcile loss from continuing operations to net cash used in operating activities:
Change in fair value of contingent consideration	2,716	0
Depreciation and amortization	3,412	8,465
Amortization of deferred financing costs	0	1,428
Provision for doubtful accounts	652	512
Provision for excess and obsolete inventory	12,261	5,659
Impairment of fixed assets	30,178	0
(Gain) loss on sale of assets	(561)	1,450
Impairment of goodwill	11,706	0
Impairment of right-of-use assets	7,434	0
Impairment of intangible assets	32,363	0
Stock compensation expense	3,044	4,235
Deferred income tax (benefit) provision	(187)	18,307
Reduction in tax benefit related to stock-based awards	0	24
Non-cash lease expense	356	740
Changes in current assets and liabilities:
Accounts receivable, net	3,556	20,993
Inventories	3,955	(727)
Income taxes receivable	182	2,546
Other current assets	1,026	2,579
Other long-term assets	(16)	3,286
Accounts payable	(12,323)	1,131
Accrued liabilities	(11,260)	908
Income taxes payable	84	0
Interest payable	34	(8)
Net cash used in operating activities	(47,838)	(4,545)
Cash flows from investing activities:
Capital expenditures	(1,425)	(2,411)
Proceeds from sale of businesses	9,907	155,498
Proceeds from sale of assets	109	240
Purchase of business, net of cash acquired	(26,284)	0
Purchase of patents and other intangible assets	(8)	(614)
Net cash (used in) provided by investing activities	(17,701)	152,713
Cash flows from financing activities:
Borrowings on revolving credit facility	0	42,984
Repayments on revolving credit facility	0	(92,715)
Payment for contingent consideration	(1,200)	0
Proceeds from Paycheck Protection Program loan	4,788	0
Payments for finance leases	(70)	(51)
Purchase of treasury stock	(253)	(247)
Proceeds from sale of common stock	462	35
Net cash provided by (used in) financing activities	3,727	(49,994)
Discontinued operations:
Net cash used in operating activities	0	(322)
Net cash provided by investing activities	0	337
Net cash flows provided by discontinued operations	0	15
Effect of changes in exchange rates on cash and cash equivalents	(102)	5
Net change in cash, cash equivalents and restricted cash	(61,914)	98,194
Cash, cash equivalents at beginning of period	100,575	3,044
Restricted cash at the beginning of the period	663	663
Restricted cash at the beginning of the period	101,238	3,707
Cash and cash equivalents at end of period	38,660	100,575
Restricted cash at the end of period	664	663
Cash, cash equivalents and restricted cash at end of period	$ 39,324	$ 101,238