Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended				12 Months Ended
	Jun. 30, 2018		Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Consolidated net loss	$ (120,372,000)	[1]	$ (14,025,000)	[1]	$ (218,269,000)	$ (14,656,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation of fixed assets	12,983,000		14,909,000		26,922,000	29,896,000
Amortization of intangible assets	2,051,000		1,891,000		4,159,000	3,637,000
Stock-based compensation to employees and directors	9,408,000		1,985,000		11,500,000	4,161,000
Deferred income taxes, net	(298,000)		(2,796,000)		67,697,000	(2,445,000)
Gain on investment in precious metals	0		0		(1,971,000)	(201,000)
Impairment of cryptocurrencies	9,491,000		0		9,491,000	0
Gain on sale of cryptocurrencies	(8,348,000)		0		(10,343,000)	0
Impairment of equity securities	0		4,500,000		987,000	7,350,000
Early extinguishment costs of long term debts	283,000		0		2,747,000	0
Other	(609,000)		65,000		202,000	423,000
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	1,882,000		7,391,000		(7,447,000)	(1,446,000)
Inventories, net	120,000		3,785,000		1,569,000	2,366,000
Prepaid inventories, net	554,000		897,000		144,000	3,000
Prepaids and other current assets	(8,234,000)		(9,213,000)		(2,307,000)	(3,809,000)
Other long-term assets, net	(3,827,000)		(147,000)		(5,987,000)	(729,000)
Accounts payable	6,686,000		(30,601,000)		16,292,000	(3,127,000)
Accrued liabilities	26,911,000		(22,391,000)		36,991,000	3,578,000
Deferred revenue	1,216,000		(2,643,000)		8,547,000	(4,933,000)
Other long-term liabilities	(476,000)		136,000		(467,000)	194,000
Net cash (used in) provided by operating activities	(70,579,000)		(46,257,000)		(59,543,000)	20,262,000
Cash flows from investing activities:
Purchases of intangible assets	(9,241,000)		0		(9,664,000)	0
Proceeds from sale of precious metals	0		0		11,917,000	1,610,000
Investment in precious metals	0		0		0	(1,633,000)
Disbursement of note receivable	(200,000)		(250,000)		(700,000)	(868,000)
Investment in equity securities	(29,570,000)		(3,188,000)		(31,570,000)	(3,938,000)
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	(12,749,000)		(16,450,000)		(19,885,000)	(45,883,000)
Other	22,000		(115,000)		207,000	(118,000)
Net cash used in investing activities	(64,650,000)		(20,003,000)		(62,607,000)	(50,802,000)
Cash flows from financing activities:
Payments on capital lease obligations	(248,000)		0		(331,000)	0
Payments on interest swap	0		0		(1,535,000)	(224,000)
Proceeds from finance obligations	0		0		0	5,325,000
Payments on finance obligations	0		(1,622,000)		(13,694,000)	(2,731,000)
Proceeds from long-term debt	0		0		40,000,000	12,621,000
Payments on long-term debt	(40,000,000)		(469,000)		(85,297,000)	(469,000)
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		157,049,000	0
Proceeds from security token offering, net of offering costs	78,442,000		0		79,347,000	0
Purchase of treasury stock	0		(10,000,000)		0	(10,000,000)
Payments of taxes withheld upon vesting of restricted stock	(4,526,000)		(1,085,000)		(4,670,000)	(1,323,000)
Payment of debt issuance costs	0		(251,000)		(419,000)	(251,000)
Net cash provided by (used in) financing activities	84,255,000		(12,773,000)		170,351,000	12,012,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(50,974,000)		(79,033,000)		48,201,000	(18,528,000)
Cash, cash equivalents and restricted cash, beginning of period	203,670,000		183,528,000		104,495,000	123,023,000
Cash, cash equivalents and restricted cash, end of period	152,696,000		104,495,000		152,696,000	104,495,000
Cash paid during the period:
Interest paid, net of amounts capitalized	1,113,000		1,308,000		2,745,000	2,238,000
Income taxes paid, net of refunds	7,000		183,000		311,000	977,000
Non-cash investing and financing activities:
Fixed assets, including internal-use software and website development, costs financed through accounts payable and accrued liabilities	735,000		690,000		735,000	690,000
Equipment acquired under capital lease obligations	0		0		1,421,000	0
Capitalized interest cost	0		0		0	27,000
Change in fair value of cash flow hedge	0		(100,000)		(1,638,000)	(3,044,000)
Note receivable converted to equity investment	200,000		869,000		699,000	3,719,000
Acquisition of assets through stock issuance	$ 2,930,000		$ 0		$ 2,930,000	$ 0

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