Changes in working capital for the years ended December 31, 2019 and 2018 are as follows:



	For the Years Ended December 31,
	2019			2018
(Increase)/decrease in accounts receivable	$	(3,290	)	$	215
(Increase)/decrease in inventories	(4,861		)	9,187
Increase in prepaids and other	(180		)	(737		)
Increase/(decrease) in accounts payable and accrued liabilities	753			(25,837		)
Decrease in other liability (see Note 15)	(6,410		)	—
Total changes in working capital	$	(13,988	)	$	(17,172	)

Other includes the following components:



	For the Years Ended December 31,
	2019			2018
Loss/(gain) on disposal of assets	$	165		$	(305	)
Inventory net realizable value adjustment and write-off	1,216			5,544
Loss on fair value of marketable securities	9			175
Unrealized loss on non-hedge derivative contracts	211			—
Accretion of vendor agreement	731			731
Accretion of rehabilitation provisions (see Note 10)	730			691
Amortization of financing fees	642			1,322
Accretion of 7% Convertible Debentures discount	2,390			2,097
Interest on lease obligation (see Note 3)	22			—
Gain on reduction of rehabilitation provisions	(179		)	(3,080		)
Interest on financing component of deferred revenue (see Note 11)	4,288			4,750
Variable consideration adjustment (See Note 11)	3,073
PRSU settlement	(349		)	—
	$	12,949		$	11,925

Reconciliation of debt arising from financing activities during the years ended December 31, 2019 and 2018:



	Equipment financing credit facility			Lease liabilities			Ecobank Loan III			Ecobank Loan IV			Vendor Agreement			7% Convertible Debentures		Royal Gold loan			Macquarie Credit Facility			Total
December 31, 2017	$	147		$	1,498		$	9,559		$	—		$	23,069		$	42,515	$	18,817		$	—		$	95,605
Cash flows
Proceeds from debt agreements	—			—			15,000			20,000			—			—		—			—			35,000
Principal payments on debt	(147		)	(1,714		)	(4,723		)	(1,999		)	(7,024		)	—		—			—			(15,607		)
Royal Gold loan repayment	—			—			—			—			—			—		(20,000		)				(20,000		)
Non-cash changes
Capitalized loan fee	—			—			—			(340		)	—			—		—			—			(340		)
Equipment lease	—			1,899			—			—			—			—		—			—			1,899
Accretion of debt	—			—			99			39			731			2,097		1,183			—			4,149
December 31, 2018	$	—		$	1,683		$	19,935		$	17,700		$	16,776		$	44,612	$	—		$	—		$	100,706
Cash flows
Proceeds from debt agreements	—			—			—			—			—			—		—			60,000			60,000
Principal payments on debt	—			(1,441		)	(20,277		)	(18,000		)	(17,507		)	—		—			—			(57,225		)
Non-cash changes
Capitalized loan fee	—			—			—			—			—			—		—			(2,614		)	(2,614		)
Corporate office lease	—			2,139			—			—			—			—		—			—			2,139
Accretion of debt	—			—			342			300			731			2,390		—			—			3,763
December 31, 2019	$	—		$	2,381		$	—		$	—		$	—		$	47,002	$	—		$	57,386		$	106,769