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Note 5 - Revolving Line of Credit (Details Textual) - Revolving Credit Facility [Member] - Texas Capital Bank, National Association [Member] | 12 Months Ended
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Dec. 31, 2021 USD ($)
Line of Credit Facility, Maximum Borrowing Capacity | $ 1,500,000
Line of Credit Facility, Borrowing Base, Percent of Receivables | 80.00%
Line of Credit Facility, Interest Rate at Period End | 3.58%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.25%
Line of Credit Facility, Minimum Liquidity Threshold | $ 1,500,000
Total Leverage Ratio, Maximum Threshold | 3.00
Total Interest Coverage Ratio, Minimum Threshold | 1.50
Line of Credit Facility, Annual Draw Limit | $ 250,000
Long-term Line of Credit, Total | $ 0
London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument, Basis Spread on Variable Rate | 3.00%

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- Definition The maximum threshold of total leverage ratio required under a debt instrument covenant. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition The annual draw limit applied to the line of credit facility. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The percent of borrowing base of the line of credit facility, calculated as a percentage of receivables. + References No definition available. + Details
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- Definition The amount of liquidity that the company is required to maintain for the line of credit agreement. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The minimum threshold required for the total interest coverage ratio. + References No definition available. + Details
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X
- 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 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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=120400017&loc=d3e572229-122910 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + 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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Details
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- Details
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- Details
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