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Note 7 - Financing Arrangements (Details) (USD $) | 0 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 05, 2011 | Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2012
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Restricted Cash and Cash Equivalents |  | $ 400,000 us-gaap_RestrictedCashAndCashEquivalents |  |
Long-term Debt |  | 4,565,508 us-gaap_LongTermDebt | 5,285,508 us-gaap_LongTermDebt |
HSBC Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
HSBC Bank [Member] | Revolving Credit Facility [Member] | Prime Rate [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember / us-gaap_VariableRateAxis = us-gaap_PrimeRateMember |  |  |
HSBC Bank [Member] | Revolving Credit Facility [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 7,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |  |
HSBC Bank [Member] | Five-Year Term Loan [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Debt Instrument, Term | 5 years |  |  |
Debt Instrument, Face Amount | 2,100,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = cvv_Five-YearTermLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |  |
Debt Instrument, Collateral Amount | 1,000,000 us-gaap_DebtInstrumentCollateralAmount / us-gaap_CreditFacilityAxis = cvv_Five-YearTermLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |  |
Debt Instrument, Collateral Release Amount | 200,000 cvv_DebtInstrumentCollateralReleaseAmount / us-gaap_CreditFacilityAxis = cvv_Five-YearTermLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |  |
Debt Instrument, Periodic Payment |  | 35,000 us-gaap_DebtInstrumentPeriodicPayment / us-gaap_CreditFacilityAxis = cvv_Five-YearTermLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |
Loans Payable to Bank |  | 700,000 us-gaap_LoansPayableToBank / us-gaap_CreditFacilityAxis = cvv_Five-YearTermLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember | 1,120,000 us-gaap_LoansPayableToBank / us-gaap_CreditFacilityAxis = cvv_Five-YearTermLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |
HSBC Bank [Member] | HSBC Bank Mortgage Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = cvv_HSBCBankMortgageLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |
HSBC Bank [Member] | HSBC Bank Mortgage Loan [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | 6,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = cvv_HSBCBankMortgageLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember
Debt Instrument, Interest Rate, Stated Percentage |  | 1.9108%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = cvv_HSBCBankMortgageLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember | 1.9166%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = cvv_HSBCBankMortgageLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |
Long-term Debt |  | 3,865,508 us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = cvv_HSBCBankMortgageLoanMember / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |
HSBC Bank [Member] |  |  |  |
Note 7 - Financing Arrangements (Details) [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 9,100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = cvv_HSBCBankMember |  |  |

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- Definition The amount, on each anniversary of the closing date, that is released so long as no event of default has occurred. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the required periodic payments including both interest and principal payments. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: 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=6479336&loc=d3e64711-112823 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer. + References Reference 1: 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 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(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 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 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: 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 + Details
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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 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 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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