Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Consolidated net loss	$ (54,456,000)	$ (6,282,000)	$ (160,096,000)	$ (8,128,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation of fixed assets	6,581,000	7,698,000	27,731,000	28,792,000
Amortization of intangible assets	918,000	945,000	3,972,000	3,815,000
Stock-based compensation to employees and directors	6,435,000	940,000	9,572,000	4,863,000
Deferred income taxes, net	(267,000)	(806,000)	65,738,000	(771,000)
Gain on investment in precious metals	0	0	(1,971,000)	(201,000)
Impairment of cryptocurrencies	(8,793,000)	0	(8,793,000)	0
Gain on sale of cryptocurrencies	(1,529,000)	0	(3,524,000)	0
Impairment of equity investment	0	4,500,000	987,000	7,350,000
Early extinguishment costs of long term debts	0	0	2,464,000	0
Other	185,000	38,000	1,023,000	381,000
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	8,282,000	6,527,000	(183,000)	(2,528,000)
Inventories, net	1,232,000	1,211,000	5,255,000	1,713,000
Prepaid inventories, net	767,000	(626,000)	1,880,000	(1,536,000)
Prepaids and other current assets	1,471,000	(1,173,000)	(642,000)	(1,891,000)
Other long-term assets, net	(2,261,000)	(404,000)	(4,164,000)	(1,202,000)
Accounts payable	4,325,000	(20,456,000)	3,786,000	6,236,000
Accrued liabilities	9,274,000	(13,689,000)	10,652,000	16,583,000
Deferred revenue	284,000	(1,593,000)	6,565,000	(2,625,000)
Other long-term liabilities	(216,000)	73,000	(144,000)	119,000
Net cash (used in) provided by operating activities	(10,182,000)	(23,097,000)	(22,306,000)	50,970,000
Cash flows from investing activities:
Purchases of intangible assets	(9,181,000)	0	(9,604,000)	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	0	(250,000)	(500,000)	(1,068,000)
Investment in equity securities	(16,970,000)	(777,000)	(21,381,000)	(5,527,000)
Acquisitions of businesses, net of cash acquired	(11,769,000)	0	(11,769,000)	43,000
Expenditures for fixed assets, including internal-use software and website development	(4,029,000)	(11,344,000)	(16,271,000)	(64,033,000)
Other	(1,000)	(118,000)	187,000	(92,000)
Net cash used in investing activities	(41,950,000)	(12,489,000)	(47,421,000)	(70,700,000)
Cash flows from financing activities:
Payments on capital lease obligations	(123,000)	0	(206,000)	0
Payments on finance obligations	0	(817,000)	(14,499,000)	(2,348,000)
Payments on interest swap	0	0	(1,535,000)	(422,000)
Proceeds from finance obligations	0	0	0	7,978,000
Proceeds from long-term debt	0	0	40,000,000	25,150,000
Payments on long-term debt	0	(187,000)	(45,579,000)	(187,000)
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 of stock warrants	0	0	6,462,000	0
Proceeds from exercise of stock warrants	50,562,000	0	150,562,000	0
Proceeds from security token offering, net of offering costs	62,073,000
Proceeds From Issuance Initial Public Offering Of Digital Currencies		0	62,978,000	0
Purchase of treasury stock	0	(10,000,000)	0	(10,000,000)
Payments of taxes withheld upon vesting of restricted stock	(4,034,000)	(822,000)	(4,441,000)	(1,354,000)
Payment of debt issuance costs	0	0	(670,000)	0
Net cash provided by (used in) financing activities	108,478,000	(11,172,000)	192,973,000	27,881,000
Net increase (decrease) in cash, cash equivalents and restricted cash	56,346,000	(46,758,000)	123,246,000	8,151,000
Cash, cash equivalents and restricted cash, beginning of period	203,670,000	183,528,000	136,770,000	128,619,000
Cash, cash equivalents and restricted cash, end of period	260,016,000	136,770,000	260,016,000	136,770,000
Cash paid during the period:
Interest paid, net of amounts capitalized	789,000	646,000	3,083,000	1,636,000
Income taxes paid, net of refunds	7,000	0	494,000	859,000
Non-cash investing and financing activities:
Fixed assets, including internal-use software and website development, costs financed through accounts payable and accrued liabilities	965,000	1,317,000	965,000	1,317,000
Equipment acquired under capital lease obligations	0	0	1,421,000	0
Capitalized interest cost	0	0	0	66,000
Change in value of cash flow hedge	0	(240,000)	(1,498,000)	(2,493,000)
Note receivable converted to equity investment	200,000	0	1,568,000	2,850,000
Cryptocurrency received in security token offering	$ 13,878,000	$ 0	$ 13,878,000	$ 0