Description of the frequency of periodic payments (monthly, quarterly, annual).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of the required periodic payments including both interest and principal payments.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
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Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

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- Definition

The effective interest rate at the end of the reporting period.

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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

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The effective interest rate during the reporting period.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payments of both interest and principal.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Including the current and noncurrent portions, the carrying value as of the balance sheet date of notes payable to banks, excluding mortgage notes, initially due beyond one year or beyond the operating cycle if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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2. Debt and Notes Payable (Details Narrative)	12 Months Ended
2. Debt and Notes Payable (Details Narrative)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 MYR (RM)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 MYR (RM)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Note payable to bank	$ 3,417,000					$ 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	4.50%	4.50%	4.50%
Credit line interest rate description	Variable rate equal to one percent per annum above the Wall Street Journal Prime Rate, with a minimum floor rate of 4.5%	Variable rate equal to one percent per annum above the Wall Street Journal Prime Rate, with a minimum floor rate of 4.5%	Variable rate equal to one percent per annum above the Wall Street Journal Prime Rate, with a minimum floor rate of 4.5%
Credit line expiration date	Oct. 15, 2018	Oct. 15, 2018	Oct. 15, 2018
Line of Credit [Member] \| European [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	$ 600,000
Credit line balance outstanding	$ 36,000
Credit line interest rate description	Variable interest rate of bank prime plus 2.8% to the average 1-month EURIBOR plus the bank margin of 3.3%	Variable interest rate of bank prime plus 2.8% to the average 1-month EURIBOR plus the bank margin of 3.3%	Variable interest rate of bank prime plus 2.8% to the average 1-month EURIBOR plus the bank margin of 3.3%
Credit line interest rate at period end	2.90%			2.90%	2.90%
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	$ 1,236,000
Credit line balance outstanding	$ 309,000
Credit line interest rate at period end	5.20%			5.20%	5.20%
Credit line expiration date	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2018
Credit line frequency of payment	monthly	monthly	monthly
Credit line periodic payment	$ 20,591
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| HSBC [Member] \| Overdrafts [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	124,000
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| HSBC [Member] \| Import/Export Line [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	2,585,000
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| HSBC [Member] \| Foreign Exchange [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	1,236,000
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| RHB Bank Berhad [Member] \| Foreign Exchange [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	618,000
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| RHB Bank Berhad [Member] \| Multi-Trade Line [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	865,000
TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| RHB Bank Berhad [Member] \| Bank Guarantee [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity	297,000
EURO [Member] \| Line of Credit [Member] \| European [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| €				€ 500,000
Credit line balance outstanding \| €				30,000
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					RM 5,000,000
Credit line balance outstanding	1,250,000
Credit line periodic payment \| RM			RM 83,333
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| HSBC [Member] \| Overdrafts [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					500,000
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| HSBC [Member] \| Import/Export Line [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					10,460,000
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| HSBC [Member] \| Foreign Exchange [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					5,000,000
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| RHB Bank Berhad [Member] \| Foreign Exchange [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					2,500,000
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| RHB Bank Berhad [Member] \| Multi-Trade Line [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					3,500,000
RM [Member] \| TOR Minerals Malaysia [Member] \| Line of Credit [Member] \| Asian Operations [Member] \| RHB Bank Berhad [Member] \| Bank Guarantee [Member]
Debt Instrument [Line Items]
Credit line maximum borrowing capacity \| RM					RM 1,200,000
Euro term note 1 [Member] \| Netherlands Bank [Member]
Debt Instrument [Line Items]
Note payable to bank	$ 211,000					206,000
Periodic payment frequency	monthly	monthly	monthly
Amount of periodic payment	$ 1,939
Euro term note 1 [Member] \| Netherlands Bank [Member] \| EURO [Member]
Debt Instrument [Line Items]
Note payable to bank \| €				176,000
Amount of periodic payment \| €		€ 1,616
Euro term note 2 [Member] \| Netherlands Bank [Member]
Debt Instrument [Line Items]
Note payable to bank	$ 245,000					234,000
Periodic payment frequency	monthly	monthly	monthly
Amount of periodic payment	$ 1,879
Euro term note 2 [Member] \| Netherlands Bank [Member] \| EURO [Member]
Debt Instrument [Line Items]
Note payable to bank \| €				204,000
Amount of periodic payment \| €		€ 1,566
Euro term note 3 [Member] \| Netherlands Bank [Member]
Debt Instrument [Line Items]
Note payable to bank	$ 960,000					947,000
Periodic payment frequency	monthly	monthly	monthly
Amount of periodic payment	$ 10,000
Euro term note 3 [Member] \| Netherlands Bank [Member] \| EURO [Member]
Debt Instrument [Line Items]
Note payable to bank \| €				800,000
Amount of periodic payment \| €		€ 8,333
Euro term note 4 [Member] \| Netherlands Bank [Member]
Debt Instrument [Line Items]
Note payable to bank	1,692,000					$ 1,978,000
Amount of periodic payment	$ 47,000
Euro term note 4 [Member] \| Netherlands Bank [Member] \| EURO [Member]
Debt Instrument [Line Items]
Note payable to bank \| €				€ 1,410,000
Amount of periodic payment \| €		€ 39,167