Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Cash Flows [Abstract]
Consolidated net income (loss)	$ 46,171	$ (134,720)	$ (217,570)
Adjustments to reconcile consolidated net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	30,816	31,031	31,697
Non-cash operating lease cost	5,774	6,676	0
Stock-based compensation to employees and directors	12,930	18,229	14,356
Gain on sale of cryptocurrencies	(700)	(569)	(8,370)
Impairment of cryptocurrencies	501	334	10,463
Impairment of equity securities	1,017	7,090	536
Losses on equity method securities	14,459	7,734	3,869
(Gain) loss on disposal of business	(10,705)	0	3,565
Impairments on intangible assets	0	1,406	6,000
Other non-cash adjustments	300	(2,106)	(2,969)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(11,482)	13,385	(5,558)
Inventories	(403)	8,268	628
Prepaids and other current assets	(5,320)	5,956	(3,622)
Other long-term assets, net	105	(660)	(2,870)
Accounts payable	34,327	(27,158)	16,499
Accrued liabilities	52,064	(281)	5,661
Unearned revenue	30,715	(8,757)	9,150
Operating lease liabilities	(6,134)	(8,013)	0
Other long-term liabilities	2,039	543	(399)
Net cash provided by (used in) operating activities	196,474	(81,612)	(138,934)
Cash flows from investing activities:
Purchase of intangible assets	0	0	(9,597)
Purchase of equity securities	(5,388)	(12,641)	(48,731)
Proceeds from sale of equity securities and marketable securities	6,306	7,339	0
Disbursement for notes receivable	(900)	(4,715)	(3,059)
Acquisitions of businesses, net of cash acquired	11	4,886	(12,912)
Deposit on purchase of a business	0	0	(8,000)
Expenditures for property and equipment	(19,132)	(21,774)	(28,680)
Deconsolidation of cash of Medici Land Governance, Inc.	(4,056)	0	0
Other investing activities, net	(396)	53	56
Net cash used in investing activities	(23,555)	(26,852)	(110,923)
Cash flows from financing activities:
Payments on long-term debt	(2,635)	(3,141)	(40,000)
Proceeds from long-term debt	47,500	0	0
Proceeds from issuance and exercise of stock warrants	0	0	50,588
Proceeds from security token offering, net of offering costs and withdrawals	0	0	82,354
Proceeds from sale of common stock, net of offering costs	195,540	82,954	94,554
Paid in capital for noncontrolling interest	0	0	6,700
Payments of taxes withheld upon vesting of restricted stock	(2,592)	(1,407)	(4,622)
Other financing activities, net	(6,449)	2,142	(573)
Net cash provided by financing activities	231,364	80,548	189,001
Net increase (decrease) in cash, cash equivalents, and restricted cash	404,283	(27,916)	(60,856)
Cash, cash equivalents, and restricted cash, beginning of year	114,898	142,814	203,670
Cash, cash equivalents, and restricted cash, end of year	$ 519,181	$ 114,898	$ 142,814