Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash Flows From Operating Activities
Net loss	$ (1,246)	$ (2,740)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	379	658
Gain on sale of property and equipment	(10)	258
Loss on settlement of debt	30
Change in fair value of derivative liability	33
Change in fair value of liability		(38)
Stock-based compensation expense		222
Amortization of note discount	270	877
Amortization of right of use asset	10	13
Change in operating assets and liabilities
Prepaid expenses and other current assets	(119)	(36)
Intangible digital assets	4	11
Management agreement termination liability		(68)
Operating lease liability	(10)	(13)
Other assets	120	(5)
Accounts payable	71	584
Accrued expenses	(170)	56
Net cash used in operating activities	(638)	(191)
Cash Flows From Investing Activities
Purchase of property and equipment		(370)
Proceeds from sale of property and equipment	141	299
Deposits made on property and equipment		(38)
Refund of security deposit		34
Net cash provided by (used in) investing activities	141	(75)
Cash Flows From Financing Activities
Proceeds from convertible note payable	1,000
Proceeds from SBA PPP bank loan		108
Net cash provided by financing activities	1,000	108
Net change in cash and cash equivalents	503	(158)
Cash and cash equivalents, beginning of year	236	216
Cash and cash equivalents, end of period	739	58
Supplemental disclosure of cash flow information
Cash paid for interest
Cash paid for income tax
Non-cash investing and financing activities
Conversion of notes payable into common stock	120	350
Discount related to convertible promissory note	$ 1,000