Line of Credit and Long-Term Debt - Additional Information (Details)	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 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		$ 59,151,000	$ 59,151,000		$ 61,897,000
Promissory note agreement
Line of Credit Facility [Line Items]
Long-term debt		2,309,000	2,309,000
Debt instrument face amount				$ 4,750,000
Stated interest rate				4.25%
Periodic principal and interest payments				$ 36,000
Additional payment	$ 687,000
Principal monthly payments		28,000
Term Notes
Line of Credit Facility [Line Items]
Long-term debt		56,842,000	$ 56,842,000		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
RLC outstanding balance		0	$ 0		$ 0
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%