Cash flow information (Tables)

12 Months Ended

Dec. 31, 2019

Cash flow information

Schedule of reconciliation of net loss for the period to cash used in operations

	Year Ended December 31,
	2019		2018
	(in thousands)
Cash flows from operating activities:
Net loss	$	(5,386)	$	(1,945)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		1,098		1,171
Accretion of asset retirement obligation		225		163
Loss (gain) on trading securities		217		(92)
Asset write off		19		13
Gain on reduction of asset retirement obligation		(63)		—
Gain on sale of assets		(3,144)		(5,144)
Stock compensation		782		226
Changes in operating assets and liabilities from continuing operations:
Decrease (increase) in lease receivable		33		(167)
(Increase) decrease in prepaid expenses and other assets		(37)		549
(Increase) decrease in inventories		(2)		13
Increase in derivative at fair value		(254)		—
Increase in other long term assets		(562)		(432)
(Decrease) increase in reclamation liability		(5)		24
Increase in accounts payable and accrued liabilities		514		236
Decrease in deferred revenue		(128)		(292)
Increase in other current liabilities		1,811		—
Increase (decrease) in other long term liabilities		484		(34)
Other		3		—
Net cash used in operating activities	$	(4,395)	$	(5,711)