UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (14,337)	$ (118,771)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of contingent consideration	(701)	3,200
Depreciation and amortization	793	3,177
Provision for doubtful accounts	(42)	494
Inventory purchase commitment settlement	(7,633)
Provision for excess and obsolete inventory	687	10,465
Impairment of goodwill	0	11,706
Impairment of right-of-use assets	0	7,434
Impairment of fixed assets	0	30,178
Impairment of intangible assets	0	32,363
Gain on sale of assets	(55)	(668)
Non-cash lease expense	221	299
Stock compensation expense	2,710	2,208
Deferred income tax provision (benefit)	13	(199)
Paycheck protection plan loan forgiveness	(881)	0
Changes in current assets and liabilities:
Accounts receivable, net	111	4,714
Inventories, net	2,330	3,186
Income taxes receivable	405	(140)
Other current assets	(2,237)	823
Other long-term assets	541	(16)
Accounts payable	(604)	(11,906)
Accrued liabilities	414	(17,689)
Income taxes payable	(53)	25
Interest payable	36	22
Net cash used in operating activities	(18,282)	(39,095)
Cash flows from investing activities:
Capital expenditures	(31)	(836)
Proceeds from sale of business	0	9,907
Proceeds from sale of assets	74	86
Purchase of JP3, net of cash acquired	0	(26,284)
Abandonment of patents and other intangible assets	0	(8)
Net cash provided by (used in) investing activities	43	(17,135)
Cash flows from financing activities:
Proceeds from paycheck protection plan loan	0	4,788
Payments to tax authorities for shares withheld from employees	(161)	(123)
(Payments) proceeds from issuance of stock	(246)	416
Payments for finance leases	(44)	(152)
Net cash (used in) provided by financing activities	(451)	4,929
Effect of changes in exchange rates on cash and cash equivalents	(67)	(80)
Net change in cash, cash equivalents and restricted cash	(18,757)	(51,381)
Cash and cash equivalents at the beginning of period	38,660	100,575
Restricted cash at the beginning of period	664	663
Cash and cash equivalents and restricted cash at beginning of period	39,324	101,238
Cash and cash equivalents at end of period	20,527	49,193
Restricted cash at the end of period	40	664
Cash, cash equivalents and restricted cash at end of period	$ 20,567	$ 49,857