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Stockholders' Equity (Details 2) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares, Options Outstanding (in shares) | 214,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 228,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 218,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Weighted Average, Options Outstanding (in dollars per share) | $ 5.20 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 5.23 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 5.21 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Remaining Life, Options Outstanding | 2 years 1 month 6 days |  |
Intrinsic Value, Options Outstanding (in dollars) | $ 25,960 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue |  |
Shares, Options Vested (in shares) | 132,099 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | 83,718 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | 47,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Weighted Average, Options Vested (in dollars per share) | $ 5.07 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | $ 4.67 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | $ 4.03 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Remaining Life, Option Vested | 1 year 7 months 6 days |  |
Intrinsic Value, Options Vested (in dollars) | 25,960 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |
Stock Options By Grant Date Dec 2005 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares, Options Outstanding (in shares) | 29,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2005Member |  |
Weighted Average, Options Outstanding (in dollars per share) | $ 2.88 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2005Member |  |
Remaining Life, Options Outstanding | 1 year |  |
Intrinsic Value, Options Outstanding (in dollars) | 25,960 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2005Member |  |
Shares, Options Vested (in shares) | 29,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2005Member |  |
Weighted Average, Options Vested (in dollars per share) | $ 2.88 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2005Member |  |
Remaining Life, Option Vested | 1 year |  |
Intrinsic Value, Options Vested (in dollars) | 25,960 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2005Member |  |
Stock Options By Grant Date Dec 2010 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares, Options Outstanding (in shares) | 65,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2010Member |  |
Weighted Average, Options Outstanding (in dollars per share) | $ 6.15 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2010Member |  |
Remaining Life, Options Outstanding | 1 year |  |
Intrinsic Value, Options Outstanding (in dollars) | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2010Member |  |
Shares, Options Vested (in shares) | 55,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2010Member |  |
Weighted Average, Options Vested (in dollars per share) | $ 6.08 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2010Member |  |
Remaining Life, Option Vested | 1 year |  |
Intrinsic Value, Options Vested (in dollars) | 0 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateDec2010Member |  |
Stock Options By Grant Date Jan 2011 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares, Options Outstanding (in shares) | 6,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateJan2011Member |  |
Weighted Average, Options Outstanding (in dollars per share) | $ 5.96 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateJan2011Member |  |
Remaining Life, Options Outstanding | 1 year |  |
Intrinsic Value, Options Outstanding (in dollars) | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateJan2011Member |  |
Shares, Options Vested (in shares) | 3,999 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateJan2011Member |  |
Weighted Average, Options Vested (in dollars per share) | $ 5.96 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateJan2011Member |  |
Remaining Life, Option Vested | 1 year |  |
Intrinsic Value, Options Vested (in dollars) | 0 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateJan2011Member |  |
Stock Options By Grant Date Nov 2012 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares, Options Outstanding (in shares) | 104,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2012Member |  |
Weighted Average, Options Outstanding (in dollars per share) | $ 5.17 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2012Member |  |
Remaining Life, Options Outstanding | 2 years 10 months 24 days |  |
Intrinsic Value, Options Outstanding (in dollars) | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2012Member |  |
Shares, Options Vested (in shares) | 41,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2012Member |  |
Weighted Average, Options Vested (in dollars per share) | $ 5.17 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2012Member |  |
Remaining Life, Option Vested | 2 years 10 months 24 days |  |
Intrinsic Value, Options Vested (in dollars) | 0 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2012Member |  |
Stock Options By Grant Date Nov 2013 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares, Options Outstanding (in shares) | 10,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2013Member |  |
Weighted Average, Options Outstanding (in dollars per share) | $ 5.75 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2013Member |  |
Remaining Life, Options Outstanding | 3 years 10 months 24 days |  |
Intrinsic Value, Options Outstanding (in dollars) | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2013Member |  |
Shares, Options Vested (in shares) | 2,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2013Member |  |
Weighted Average, Options Vested (in dollars per share) | $ 5.75 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2013Member |  |
Remaining Life, Option Vested | 3 years 10 months 24 days |  |
Intrinsic Value, Options Vested (in dollars) | $ 0 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_StatementEquityComponentsAxis = ctib_StockOptionsByGrantDateNov2013Member |  |

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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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