Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities
Net loss	$ (2,740)	$ (5,328)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	658
(Gain) loss on sale of property and equipment	258	(82)
Change in fair value of liability	(38)
Stock-based compensation expense	222	1,679
Extinguishment of note payable		(2,748)
Amortization of note discount	877	4,164
Change in operating assets and liabilities
Prepaid expenses and other current assets	(36)	(220)
Intangible digital assets	11	(54)
Management agreement termination liability	(68)
Right of use asset	13	36
Operating lease liability	(13)	(37)
Other assets	(5)	4
Accounts payable	584	(108)
Accrued expenses	56	83
Net cash used in operating activities	(191)	(2,611)
Cash Flows From Investing Activities
Purchase of property and equipment	(370)	(72)
Deposits made on property and equipment	(38)
Refund of security deposit	34
Proceeds from sale of property and equipment	299
Net cash used in investing activities	(75)	(72)
Cash Flows From Financing Activities
Proceeds from sale of common stock		525
Payment of deferred offering costs		(8)
Proceeds from sale of stock under equity purchase agreement, net of issuance costs		3,329
Sale of preferred stock, net of issuance costs		1,890
Repayment of notes payable		(210)
Proceeds from exercise of warrants		120
Proceeds from SBA PPP bank loan	108
Net cash provided by financing activities	108	5,646
Net change in cash and cash equivalents	(158)	2,963
Cash and cash equivalents, beginning of period	216	96
Cash and cash equivalents, end of period	58	3,059
Supplemental disclosure of cash flow information
Cash paid for interest		3
Cash paid for income tax
Non-cash investing and financing activities
Deemed dividend on warrant modification and beneficial conversion feature of preferred stock		959
Cumulative effect adjustment related to ASU adoption		3
Conversion of notes payable into common stock	775	1,697
Repayment of note payable and interest through the issuance of shares under the equity purchase agreement		354
Non-cash deferred offering costs		62
Conversion of Series C convertible preferred stock into common stock		$ 14