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Debt and Line of Credit (Details Textual) |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 27, 2019 USD ($) | Oct. 30, 2018 USD ($) covenant | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | May 31, 2020 USD ($) | Apr. 01, 2019 USD ($) | Apr. 30, 2010 interestRateSwapAgreement | Apr. 01, 2010 contract
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Total long-term debt |  |  | $ 6,927,000 | $ 0 |  |  |  |
Repayments of long-term lines of credit |  |  | 0 | 15,000,000 |  |  |  |
2018 term notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repayments of long-term debt | $ 21,375,000 |  |  |  |  |  |  |
PPP Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Total long-term debt |  |  | 6,927,000 | 0 | $ 6,927,000 |  |  |
Senior Credit Facility | Line of Credit | 2018 term notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Term of debt instrument |  | 3 years |  |  |  |  |  |
Maximum borrowing capacity |  | $ 42,500,000 |  |  |  |  |  |
Senior Credit Facility | Line of Credit | Term loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | 22,500,000 |  |  |  |  |  |
Senior Credit Facility | Line of Credit | Revolving loan agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 20,000,000 | 15,000,000 | $ 20,000,000 |  |  |  |
Repayments of long-term lines of credit | $ 13,000,000 |  |  |  |  |  |  |
Line of credit facility, current borrowing capacity |  |  | $ 9,400,000 |  |  |  |  |
Number of financial covenants | covenant |  | 2 |  |  |  |  |  |
Consolidated fixed charge coverage ratio |  | 1.25 |  |  |  |  |  |
Mortgage Loan On Headquarters Facility | Mortgages |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Balloon payment to be paid |  |  |  |  |  | $ 2,551,000 |  |
Mortgage Loan On Headquarters Facility | Mortgages | Period One |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Strike rate |  |  |  |  |  |  | 5.91% |
Mortgage Loan On Headquarters Facility | Mortgages | Period Two |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Strike rate |  |  |  |  |  |  | 6.07% |
Debt Covenant Period, One | Senior Credit Facility | Line of Credit | Revolving loan agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Consolidated leverage ratio |  | 2.50 |  |  |  |  |  |
Debt Covenant Period, Two | Senior Credit Facility | Line of Credit | Revolving loan agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Consolidated leverage ratio |  | 2.00 |  |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Number of interest rate swap agreements |  |  |  |  |  |  | 2 | 2

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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