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v3.21.2

NOTES PAYABLE AND LONG-TERM DEBT (Details) shares in Millions |  |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 20, 2018 | Sep. 18, 2015 USD ($) shares | Jun. 30, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2019 shares | Sep. 01, 2016 shares | Aug. 31, 2015 shares
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  | $ 416,000 | $ 0 |  |  |
Number of shares authorized to be repurchased (in shares) | shares |  |  |  |  |  |  | 1.0 | 2.2 | 1.2
Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |
TOTAL |  |  |  |  | 446,000 | 0 |  |  |
Promissory Note And Business Loan Agreement With BOKF, Working Capital [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  | 0 | 0 |  |  |
Line of credit facility maximum borrowing capacity |  |  |  |  | $ 6,000,000 |  |  |  |
Maturity date |  |  |  |  | Sep. 18, 2024 |  |  |  |
Debt instrument interest rate increase (decrease) | (0.35%) |  |  |  |  |  |  |  |
Promissory Note And Business Loan Agreement With BOKF, Working Capital [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Debt covenants, fixed charge coverage ratio |  | 1.2 |  |  |  |  |  |  |
Promissory Note And Business Loan Agreement With BOKF, Working Capital [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Debt covenants, debt to EBITDA ratio |  | 1.5 |  |  |  |  |  |  |
Promissory Note and Business Loan Agreement with BOKF, Stock Repurchase [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Line of credit facility maximum borrowing capacity |  | $ 10,000,000 |  |  | $ 15,000,000 |  |  |  |
Maturity date |  |  |  |  | Sep. 18, 2024 |  |  |  |
Debt instrument interest rate increase (decrease) | (0.35%) |  |  |  |  |  |  |  |
Line of credit facility term of principal balance rolled |  |  |  |  | 4 years |  |  |  |
Repayments of lines of credit |  |  |  | $ 9,000,000 |  |  |  |  |
Line of credit outstanding |  |  |  |  | $ 0 | 0 |  |  |
Pre-payment penalty |  |  |  | $ 0 |  |  |  |  |
Promissory Note and Business Loan Agreement with BOKF, Stock Repurchase [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Number of shares authorized to be repurchased (in shares) | shares |  | 2.2 |  |  |  |  |  |  |
Institute of Official Credit Guarantee for Small and Medium-sized Enterprises [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  | $ 400,000 |  |  |  |  |  |
Term of agreement |  |  | 5 years |  | 5 years |  |  |  |
Fixed interest rate |  |  | 1.50% |  | 1.50% |  |  |  |
Period required to make monthly interest payments |  |  | 2 years |  | 2 years |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |
Line of credit note |  |  |  |  | $ 446,000 | 0 |  |  |
Less current maturities |  |  |  |  | 0 | 0 |  |  |
TOTAL |  |  |  |  | $ 446,000 | 0 |  |  |
Line of Credit [Member] | Institute of Official Credit Guarantee for Small and Medium-sized Enterprises [Member] |  |  |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  | Jun. 04, 2025 |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |
Line of credit note |  |  |  |  | $ 446,000 | $ 0 |  |  |

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