CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net cash used in operating activities	$ (4,395)	$ (5,711)
Cash flows from investing activities:
Proceeds from sale of assets	3,144	5,097
Proceeds from sale of trading securities	113
Acquisitions of property, plant and equipment	(38)	(152)
Net cash from investing activities	3,219	4,945
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs	2,476	809
Net cash from financing activities	2,476	809
Net increase in cash and cash equivalents	1,300	43
Cash and cash equivalents, beginning of period	3,293	3,250
Cash and cash equivalents, end of period	$ 4,593	$ 3,293