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2. Debt and Notes Payable (Details Narrative)
6 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2017
EUR (€)
Jun. 30, 2017
MYR
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]        
Note payable to bank $ 3,716,000     $ 3,867,000
Line of Credit [Member] | UNITED STATES        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity 1,000,000      
Credit line balance outstanding $ 0      
Credit line interest rate during period 5.00%      
Credit line interest rate at end of period 5.25% 5.25% 5.25%  
Credit line expiration date Oct. 15, 2017      
Line of Credit [Member] | European [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity $ 571,000      
Credit line balance outstanding $ 0      
Credit line interest rate at end of period 3.30% 3.30% 3.30%  
Credit line interest rate description bank prime plus 2.8% to the average 1-month EURIBOR plus the bank margin of 3.3%      
Line of Credit [Member] | European [Member] | EURO [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | €   € 500,000    
Credit line balance outstanding $ 0      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member]        
Debt Instrument [Line Items]        
Credit line interest rate during period 4.90%      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | HSBC [Member]        
Debt Instrument [Line Items]        
Credit line expiration date Jun. 30, 2018      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | HSBC [Member] | Overdrafts [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity $ 116,000      
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | HSBC [Member] | Import/Export Line [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity 2,436,000      
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | HSBC [Member] | Foreign Exchange [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity 1,165,000      
Credit line balance outstanding $ 0      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member]        
Debt Instrument [Line Items]        
Credit line expiration date Aug. 11, 2017      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member] | Foreign Exchange [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity $ 582,000      
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member] | Multi-Trade Line [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity 815,000      
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member] | Bank Guarantee [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity 279,000      
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | RM [Member] | TOR Minerals Malaysia [Member] | HSBC [Member] | Overdrafts [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | MYR     MYR 500,000  
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | RM [Member] | TOR Minerals Malaysia [Member] | HSBC [Member] | Import/Export Line [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | MYR     10,460,000  
Credit line balance outstanding $ 0      
Credit line interest rate during period 5.90%      
Line of Credit [Member] | Asian Operations [Member] | RM [Member] | TOR Minerals Malaysia [Member] | HSBC [Member] | Foreign Exchange [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | MYR     5,000,000  
Credit line balance outstanding $ 0      
Line of Credit [Member] | Asian Operations [Member] | RM [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member] | Foreign Exchange [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | MYR     2,500,000  
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | RM [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member] | Multi-Trade Line [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | MYR     3,500,000  
Credit line balance outstanding 0      
Line of Credit [Member] | Asian Operations [Member] | RM [Member] | TOR Minerals Malaysia [Member] | RHB Bank Berhad [Member] | Bank Guarantee [Member]        
Debt Instrument [Line Items]        
Credit line maximum borrowing capacity | MYR     MYR 1,200,000  
Credit line balance outstanding $ 0