Note 4 - Debt (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Debt [Table Text Block]

	Interest Rate as of			Balance as of		Interest Rate as of			Balance as of
	December 31, 2022			December 31, 2022		December 31, 2021			December 31, 2021
United States - North Mill Capital		5.25	%	$	14,399	5.38	%	$	9,680
United States - Resource Plus Seller Notes		1.85	%		1,000	1.87	%		300
Australia - National Australia Bank		10.60	%		156	6.76	%		118
South Africa - Investec Bank Ltd.		10.50	%		1,700	-	%		-
China - People's Bank of China		-	%		-	3.71	%		157
China - Industrial Bank		4.00	%		435	6.17	%		472
China - Industrial and Commercial Bank of China		4.15	%		290	4.23	%		315
Total				$	17,980			$	11,042

	Interest Rate as of			Balance Outstanding		Interest Rate as of			Balance Outstanding
	December 31, 2022			December 31, 2022		December 21, 2021			December 31, 2021
South Africa - Investec Bank Ltd.		10.5	%	$	1,376				$	–
United States - Resource Plus Seller Notes		–	%		–		1.87	%		700
Total				$	1,376				$	700

Credit And Debt Facilities Unused Availability [Table Text Block]

	December 31, 2022		December 31, 2021
Unused Availability:
United States	$	4,601	$	5,319
Mexico		1		743
China		–		157
Australia		390		455
South Africa		454		–
Total Unused Availability	$	5,446	$	6,674