Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss from continuing operations	$ (194,305)	$ (144,438)	$ (125,044)
Net loss from discontinued operations	(7,731)	(3,996)	(489)
Adjustments to reconcile net loss to net cash used in operating activities of continuing operations:
Depreciation and amortization	4,682	4,461	3,807
Stock-based compensation expense	9,207	10,850	9,885
Impairment of goodwill and intangible assets	69,419
Change in fair value of contingent consideration	4,237
Provision for credit losses	(331)	9,513
Amortization of debt discount	2,939	1,781	1,026
(Gain) loss on disposal of assets	(150)	222	232
Write off of deferred issuance costs	648
Loss on extinguishment of debt		10,278
Deferred income taxes	(10,848)	56	486
Changes in operating assets and liabilities, net of effect of acquisition:
Receivables, net	(2,703)	(16,427)	(3,738)
Prepaid expenses and other assets	4,056	5,877	864
Inventories	(5,899)	3,784	(3,844)
Accounts payable and accrued expenses	(19,223)	(13,715)	19,345
Net cash used in operating activities of continuing operations	(138,271)	(127,758)	(96,981)
Cash flows from investing activities of continuing operations:
Purchase of property and equipment	(8,398)	(8,622)	(9,714)
Payments for licenses	(2,137)	(214)	(4,175)
Acquisition activity	1,425		853
Disposal activity	101
Purchases of short-term investments	(68,672)	(161,847)	(74,697)
Sale of short-term investments	197,608	56,345	99,090
Net cash provided by (used in) investing activities of continuing operations	119,927	(114,338)	11,357
Cash flows from financing activities of continuing operations:
Proceeds from sale of stock	1,343	126,980	161,080
Proceeds from issuance of debt	783	145,126	6,464
Proceeds from issuance of warrants		7,039
Costs incurred related to the sale of stock		(7,869)	(1,103)
Costs incurred related to the issuance of debt and warrants		(9,363)
Proceeds from exercise of stock options	1,579	1,723	1,983
Investment from non-controlling interest		198
Repurchase of treasury stock	(79)
Repayment of finance lease obligations and long-term debt	(986)	(54,315)	(972)
Net cash provided by financing activities of continuing operations	2,640	209,519	167,452
Net (decrease) increase in cash, cash equivalents, and restricted cash from continuing operations	(15,704)	(32,577)	81,828
Net cash used in operating activities of discontinued operations	(4,108)	(3,486)	(479)
Net cash used in investing activities of discontinued operations	(14,943)	(4,634)	(3,858)
Net cash used in financing activities of discontinued operations	(178)	(91)	0
Net decrease in cash and cash equivalents from discontinued operations	(19,229)	(8,211)	(4,337)
Cash, cash equivalents, and restricted cash beginning of period	86,087	127,674	49,794
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	548	(799)	389
Cash, cash equivalents, and restricted cash, end of period (See Note 5)	51,702	86,087	127,674
Supplemental cash flow disclosures
Interest paid	20,336	6,056	4,925
Income taxes paid	108	3,066	448
Non-cash investing and financing activities:
Accrued purchases of property and equipment from continuing operations	246	439	113
Accrued purchases of property and equipment from discontinued operations	1,679	39	370
Equity consideration in connection with acquisition	52,786		$ 748
Accrued purchases of licenses	1,350	2,850
Accrued cost of debt issuance		750
Property and equipment financed under finance leases		848
ROU assets derecognized from modification of operating lease obligations	$ (114)	$ (468)