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Debt - Narrative (Details)	Jun. 27, 2019 USD ($)	Oct. 30, 2018 USD ($) covenant	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	May 31, 2020 USD ($)
Debt Instrument [Line Items]
Long-term debt			$ 6,927,000	$ 6,927,000
2018 Term Notes
Debt Instrument [Line Items]
Repayments of long-term debt	$ 21,375,000
PPP Loan
Debt Instrument [Line Items]
Long-term debt			6,927,000	6,927,000	$ 6,927,000
Line of Credit | Senior Credit Facility | 2018 Term Notes
Debt Instrument [Line Items]
Credit facility term		3 years
Maximum available for borrowing		$ 42,500,000
Line of Credit | Senior Credit Facility | Term Loan
Debt Instrument [Line Items]
Maximum available for borrowing		22,500,000
Line of Credit | Senior Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt			0
Maximum available for borrowing		$ 20,000,000	$ 15,000,000	$ 15,000,000
Repayments of line of credit borrowings	$ 13,000,000
Line of Credit | Senior Credit Facility | Line of Credit
Debt Instrument [Line Items]
Number of financial covenants | covenant		2
Covenant compliance, maximum consolidated fixed charge coverage ratio		1.25
Line of Credit | Senior Credit Facility | Line of Credit | Debt Covenant Period, One
Debt Instrument [Line Items]
Covenant compliance, maximum consolidated leverage ratio		2.50
Line of Credit | Senior Credit Facility | Line of Credit | Debt Covenant Period, Two
Debt Instrument [Line Items]
Covenant compliance, maximum consolidated leverage ratio		2.00

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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.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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