Income Taxes (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Examination [Line Items]
Income tax expense	$ (96,000)	$ 192,000	$ 53,000	$ 326,000
Excess tax benefits from employee stock option exercises	$ 340,000
Effective income tax rate (as a percent)			2.00%	25.00%
Need for valuation allowance based on history of cumulative losses			3 years

Need For Valuation Allowance Based On History Of Cumulative Losses

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The tax effects of employee stock option transactions that are recognized differently for financial reporting and tax purposes, occurring during the period and charged or credited directly to shareholders' equity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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