CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 2,212	$ 4,593
Lease receivables	311	448
Inventories, net	178	231
Derivative at fair value	39	254
Prepaid expenses and other assets	754	669
Total current assets	3,494	6,195
Property, plant and equipment, net	5,835	6,031
Other long term assets	906	1,131
Total assets	10,235	13,357
Current liabilities
Accounts payable and other accrued liabilities	1,559	2,127
Deferred revenue, current	354	472
Other current liabilities	1,150	1,824
Debt - related party	1,000
Total current liabilities	4,063	4,423
Asset retirement and reclamation liabilities	2,979	2,839
Other long term liabilities	437	494
Total liabilities	7,479	7,756
Commitments and contingencies
Equity
Common stock, $.01 par value, 200,000,000 shares authorized; 108,457,731 and 106,734,279 shares issued and outstanding respectively	1,084	1,067
Additional paid in capital	521,788	521,314
Accumulated deficit	(520,116)	(516,780)
Shareholders' equity	2,756	5,601
Total liabilities and equity	$ 10,235	$ 13,357