Details of Certain Balance Sheet Accounts (Schedule of Accrued Expenses) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Details Of Certain Balance Sheet Accounts [Abstract]
Accrued payroll taxes	$ 8,448	$ 1,843
Current portion of operating lease liabilities	8,057	7,234
Accrued health insurance	4,413	4,140
Accrued professional fees	3,135	2,517
Other	9,342	6,695
Total accrued expenses	$ 33,395	$ 22,429

Details Of Certain Balance Sheet Accounts Abstract

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Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory payroll taxes incurred through that date and withheld from employees pertaining to services received from them, including entity's matching share of the employees FICA taxes and contributions to the state and federal unemployment insurance programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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