Notes Payable and Long-term debt (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Aug. 31, 2019
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 10,000,000.0
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 10,000,000.0
Unrestricted Cash And Cash Equivalents Minimum Amount Required		$ 3,500,000	$ 3,500,000
Long-term Debt		8,495,000	8,495,000	$ 3,900,000
Debt Issuance Costs, Line of Credit Arrangements, Gross		600,000	600,000
Other Long-term Debt, Noncurrent		3,900,000	3,900,000
Other Current Assets [Member]
Line of Credit Facility [Line Items]
Unamortized Debt Issuance Expense		$ 300,000	$ 300,000
Notes Payable to Banks [Member]
Related Party Transactions [Abstract]
Proceeds from issuance of debt	$ 2,900,000
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 2,900,000
Debt instrument, term		2 years
Debt instrument rate		1.00%	1.00%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis			5.5
Revolving Credit Facility [Member] | Prime Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			0.50%