Income Taxes (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Tax benefit at federal statutory rate	$ 13,000	$ 690,000
State income tax effect	2,000	121,000
Foreign income tax effect	127,000	279,000
Non-deductible items	0	0
Non-taxable item - gain on CARES Act loan	93,000	0
Percentage depletion	20,000	28,000
Adj for prior year tax estimate to actual-domestic	44,000	581,000
Adj for prior year tax estimate to actual-foreign	1,431,000	(138,000)
Impact on change in foreign exchange rate	35,000	76,000
Change in valuation allowance - Domestic	(212,000)	(393,000)
Change in valuation allowance - Foreign	(1,043,000)	992,000
Total	$ 0	$ 0