Line of Credit and Long-Term Debt - Additional Information (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) covenant	Dec. 31, 2013 USD ($)	Dec. 31, 2019 USD ($)	Aug. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Interest pay rate					4.16%
RLC outstanding balance	$ 60,172,000	$ 60,172,000		$ 61,897,000
Promissory note agreement
Line of Credit Facility [Line Items]
Long-term debt	2,367,000	$ 2,367,000
Debt instrument face amount			$ 4,750,000
Stated interest rate			4.25%
Periodic principal and interest payments			$ 36,000
Additional payment	687,000
Term Notes
Line of Credit Facility [Line Items]
Long-term debt				$ 58,768,000
Term Notes | Selected LIBOR rate
Line of Credit Facility [Line Items]
Interest rate on line of credit, variable rate		1.70%
Revolving line of credit
Line of Credit Facility [Line Items]
Line of credit amount	35,000,000	$ 35,000,000			$ 30,000,000
Commitment fee percentage		0.10%
Number of debt covenants | covenant		3
Debt equity ratio		0.75
Debt service coverage ratio		1.25
Minimum liquid assets	$ 20,000,000	$ 20,000,000
Revolving line of credit | Selected LIBOR rate
Line of Credit Facility [Line Items]
Interest rate on line of credit, variable rate		1.50%
Revolving line of credit | LIBOR for a fixed rate term
Line of Credit Facility [Line Items]
Interest rate on line of credit, variable rate		1.50%
Interest Rate Swap | Other Liabilities | Level 2
Line of Credit Facility [Line Items]
Interest pay rate	4.16%	4.16%		4.16%
Interest Rate Swap | Other Liabilities | Level 2 | Term Notes
Line of Credit Facility [Line Items]
Long-term debt	$ 57,805,000	$ 57,805,000