Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net (Loss) income	$ (1,840)	$ 465
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	258	53
Stock based compensation	1,039	24
Consultant stock compensation	49
Provision (recovery) for excess and obsolete inventories	(20)
Loss on disposal of equipment		3
Changes in operating assets and liabilities:
Accounts receivable	195	(511)
Inventories	(339)	(498)
Prepaid expenses and other current assets	(6,487)	(32)
Other long-term assets	(2)	(289)
Accounts payable	1,689	395
Operating lease, net	4
Other liabilities	61	203
Accrued liabilities	356	126
Net cash used in operating activities	(5,037)	(61)
Investing Activities
Purchases of equipment	(1,336)	(348)
Purchase of stock in equity investment		(750)
Net cash used in investing activities	(1,336)	(1,098)
Financing Activities
Proceeds from equity offering	17,250	0
Costs of equity offering	(1,495)	0
Proceeds from stock option exercises	84	0
Net cash provided by financing activities	15,839	0
Increase (decrease) in cash	9,466	(1,159)
Cash – beginning of period	2,630	2,510
Cash – end of period	12,096	1,351
Supplemental Disclosure of Cash Flow Information
Purchase of miner equipment using restricted stock	(207)
Registration statement fees in prepaids and accounts payable	$ 352