UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (14,846)	$ (73,528)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of contingent consideration	(302)	0
Depreciation and amortization	560	2,659
Provision for doubtful accounts	(1)	474
Provision for excess and obsolete inventory	580	529
Impairment of right-of-use assets	0	7,434
Impairment of fixed assets	0	30,178
Impairment of intangible assets	0	19,842
Gain on sale of assets	(69)	(631)
Non-cash lease expense	163	242
Stock compensation expense	1,750	1,521
Deferred income tax provision (benefit)	10	(105)
PPP loan forgiveness	(881)	0
Changes in current assets and liabilities:
Accounts receivable, net	1,995	7,252
Inventories, net	(222)	6,418
Income taxes receivable	207	(6,351)
Other current assets	(672)	1,715
Other long-term assets	541	0
Accounts payable	801	(10,229)
Accrued liabilities	(1,048)	(16,755)
Income taxes payable	168	119
Interest payable	24	0
Net cash used in operating activities	(11,242)	(29,216)
Cash flows from investing activities:
Capital expenditures	(31)	(42)
Proceeds from sale of business	0	9,844
Proceeds from sale of assets	74	66
Purchase of JP3, net of cash acquired	0	(26,284)
Abandonment of patents and other intangible assets	0	(8)
Net cash provided (used in) by investing activities	43	(16,424)
Cash flows from financing activities:
Proceeds from Paycheck Protection Program loan	0	4,798
Purchase of treasury stock	(78)	(82)
Proceeds from sale of common stock	(166)	358
Payments for finance leases	(29)	(51)
Net cash (used in) provided by financing activities	(273)	5,023
Effect of changes in exchange rates on cash and cash equivalents	(31)	(31)
Net change in cash, cash equivalents and restricted cash	(11,503)	(40,648)
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	27,781	59,926
Restricted cash at the end of period	40	664
Cash, cash equivalents and restricted cash at end of period	$ 27,821	$ 60,590