CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 3,557	$ 4,593
Lease receivables	353	448
Inventories, net	186	231
Derivative at fair value	128	254
Prepaid expenses and other assets	705	669
Total current assets	4,929	6,195
Property, plant and equipment, net	5,471	6,031
Other long term assets	1,013	1,131
Total assets	11,413	13,357
Current liabilities
Accounts payable and other accrued liabilities	1,152	2,127
Deferred revenue, current	227	472
Debt - related party	1,025
Other current liabilities	870	1,824
Total current liabilities	3,274	4,423
Asset retirement and reclamation liabilities	3,040	2,839
Other long term liabilities	412	494
Total liabilities	6,726	7,756
Commitments and contingencies
Equity
Common stock, $.01 par value, 200,000,000 shares authorized; 128,176,731 and 106,734,938 shares issued and outstanding respectively	1,282	1,067
Additional paid in capital	525,844	521,314
Accumulated deficit	(522,439)	(516,780)
Shareholders' equity	4,687	5,601
Total liabilities and equity	$ 11,413	$ 13,357