Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended				12 Months Ended
	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Consolidated net loss	$ (169,629,000)	[1]	$ (15,130,000)	[1]	$ (266,421,000)	$ (12,369,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of fixed assets	19,437,000		21,895,000		26,390,000	29,468,000
Amortization of intangible assets	3,596,000		2,839,000		4,756,000	3,614,000
Stock-based compensation to employees and directors	11,654,000		3,009,000		12,722,000	3,795,000
Deferred income taxes, net	(383,000)		(8,682,000)		73,498,000	(7,651,000)
Gain on investment in precious metals	0		(1,907,000)		(64,000)	(2,108,000)
Impairment of cryptocurrencies	9,641,000		0		9,641,000	0
Gain on sale of cryptocurrencies	(8,412,000)		(845,000)		(9,562,000)	(845,000)
Impairment of equity securities	511,000		4,500,000		1,498,000	4,500,000
Early extinguishment costs of long term debts	283,000		0		2,747,000	0
Other	741,000		420,000		1,197,000	569,000
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(73,000)		3,814,000		(5,825,000)	(3,283,000)
Inventories, net	(1,833,000)		5,375,000		(1,974,000)	2,155,000
Prepaids and other current assets	(4,806,000)		(5,950,000)		(1,655,000)	(680,000)
Other long-term assets, net	(4,120,000)		(121,000)		(6,306,000)	(551,000)
Accounts payable	7,143,000		(35,794,000)		21,942,000	(14,370,000)
Accrued liabilities	18,044,000		(35,831,000)		41,564,000	(10,217,000)
Deferred revenue	(1,511,000)		(275,000)		3,452,000	248,000
Other long-term liabilities	(583,000)		235,000		(673,000)	280,000
Net cash used in operating activities	(120,300,000)		(62,448,000)		(93,073,000)	(7,445,000)
Cash flows from investing activities:
Purchases of intangible assets	(9,583,000)		0		(10,006,000)	0
Proceeds from sale of precious metals	0		11,603,000		314,000	13,213,000
Investment in precious metals	0		0		0	(1,633,000)
Disbursement of note receivable	(2,700,000)		(750,000)		(2,700,000)	(1,368,000)
Investment in equity securities	(43,670,000)		(4,188,000)		(44,670,000)	(4,938,000)
Acquisitions of businesses, net of cash acquired	(12,912,000)		0		(12,912,000)	28,000
Expenditures for fixed assets, including internal-use software and website development	(20,677,000)		(20,873,000)		(23,390,000)	(33,772,000)
Other	34,000		(160,000)		264,000	(179,000)
Net cash used in investing activities	(89,508,000)		(14,368,000)		(93,100,000)	(28,649,000)
Cash flows from financing activities:
Payments on capital lease obligations	(372,000)		0		(455,000)	0
Payments on interest swap	0		0		(1,535,000)	0
Proceeds from finance obligations	0		0		0	5,324,000
Payments on finance obligations	0		(2,436,000)		(12,880,000)	(2,988,000)
Proceeds from long-term debt	0		0		40,000,000	4,826,000
Payments on long-term debt	(40,000,000)		(750,000)		(85,016,000)	(750,000)
Payments of preferred dividends	0		0		(109,000)	0
Proceeds from exercise of stock options	0		654,000		10,000	1,473,000
Proceeds from rights offering, net of offering costs	0		0		0	7,591,000
Proceeds from issuance and exercise of stock warrants	50,587,000		0		157,046,000	0
Proceeds from security token offering, net of offering costs	82,610,000		3,000		83,515,000	3,000
Proceeds from sale of common stock, net of offering costs	94,624,000		0		94,624,000	0
Purchase of treasury stock	0		(10,000,000)		0	(10,000,000)
Paid in capital for noncontrolling interest	6,700,000		0		6,700,000	0
Payments of taxes withheld upon vesting of restricted stock	(4,574,000)		(1,104,000)		(4,699,000)	(1,207,000)
Payment of debt issuance costs	0		(251,000)		(419,000)	(251,000)
Net cash provided by (used in) financing activities	189,575,000		(13,884,000)		276,782,000	4,021,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(20,233,000)		(90,700,000)		90,609,000	(32,073,000)
Cash, cash equivalents and restricted cash, beginning of period	203,670,000		183,528,000		92,828,000	124,901,000
Cash, cash equivalents and restricted cash, end of period	183,437,000		92,828,000		183,437,000	92,828,000
Cash paid during the period:
Interest paid, net of amounts capitalized	1,232,000		1,980,000		2,192,000	2,574,000
Income taxes paid, net of refunds	59,000		492,000		54,000	624,000
Non-cash investing and financing activities:
Fixed assets, including internal-use software and website development, costs financed through accounts payable and accrued liabilities	731,000		618,000		731,000	618,000
Equipment acquired under capital lease obligations	0		0		1,421,000	362,000
Capitalized interest cost	0		0		0	(12,000)
Change in fair value of cash flow hedge	0		(180,000)		(1,558,000)	(2,619,000)
Note receivable converted to equity investment	200,000		869,000		699,000	869,000
Acquisition of assets through stock issuance	$ 4,430,000		$ 0		$ 4,430,000	$ 0

[1] Net income (loss) presented for segment reporting purposes is before any adjustments attributable to noncontrolling interests.