Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (55,998)	$ (62,136)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,810	6,577
Loss on disposals of assets, net	217	493
Gain on sale of discontinued operations	672	0
Loss on release of cumulative foreign currency translation adjustments to loss from discontinued operations	26,957	0
Unrealized and realized (appreciation) depreciation on equity securities and preferred stock, net	106	(70)
Amortization of discounts on investments, net	(233)	(352)
Equity in net loss of affiliates	389	1,640
Stock-based compensation expense	4,372	9,054
Shares issued as payment for services	930	831
Provision for credit losses	523	64
Accretion of debt discount and amortization of deferred financing costs	2,517	2,213
Deferred income taxes	0	(508)
Other noncash items	239	235
Receivables:
Trade	438	1,306
Related parties	25	1,584
Other	1,736	642
Inventory	1,202	1,381
Prepaid expenses and other	927	(322)
Other assets	7	13
Accounts payable	(917)	(1,237)
Accrued compensation and benefits	(1,941)	(1,788)
Other accrued liabilities	(2,974)	(6,129)
Deferred revenue	(10,437)	1,330
Lease liabilities	(53)	29
Related party payables	87	1,916
Net cash used in operating activities	(27,743)	(43,234)
Cash flows from investing activities
Purchases of investments	(119,267)	0
Sales and maturities of investments	18,000	45,000
Proceeds from sales of equity securities	0	418
Investments in affiliates	0	(370)
Purchases of property, plant and equipment	(3,152)	(11,523)
Proceeds from sale of assets	684	67
Proceeds from sale of discontinued operations, net of cash sold	64,240	0
Proceeds from repayment of notes receivable	2,942	0
Net cash provided by (used in) investing activities	(36,553)	33,592
Cash flows from financing activities
Proceeds from issuance of shares in a private placement	35,000	0
Proceeds from issuance of shares and warrants in public offering, net of issuance costs	0	6,611
Advances from lines of credit	8,718	1,408
Repayments of advances from lines of credit	(9,435)	(1,597)
Proceeds from long-term debt, net of issuance costs	0	376
Payments of long-term debt	(132)	(178)
Proceeds from stock option and warrant exercises	0	307
Net cash provided by financing activities	34,151	6,927
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(39)	(504)
Net decrease in cash, cash equivalents, and restricted cash	(30,184)	(3,219)
Cash, cash equivalents, and restricted cash
Beginning of period	68,434	110,182
End of period	38,250	106,963
Supplemental disclosure of cash flow information
Cash paid during the period for interest	3,568	77
Cash paid during the period for income taxes	40	30
Significant noncash activities
Accrued compensation paid in equity awards	5,100	1,102
Purchases of property and equipment included in accounts payable and other accrued liabilities	369	2,531
Cash, cash equivalents, and restricted cash
Cash, cash equivalents, and restricted cash	$ 38,250	$ 106,963