Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator [Abstract]
Net income (loss)	$ (1,027)	$ (3,584)	$ (4,565)	$ (3,802)	$ (4,611)	$ (8,367)
Common Stock Class A [Member]
Numerator [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	(1,017)		(4,519)		(4,565)	(8,283)
Net Income (Loss) Available to Common Stockholders, Diluted	$ (1,017)		$ (4,519)		$ (4,565)	$ (8,283)
Denominator [Abstract]
Weighted Average Number of Shares Outstanding, Basic	49,345		49,229		49,322	49,229
Weighted Average Number of Shares Outstanding, Diluted	49,528		49,280		49,506	49,280
Basic and diluted earnings (loss) per share (in dollars per share)	$ (0.02)		$ (0.09)		$ (0.09)	$ (0.17)
Common Stock Class B [Member]
Numerator [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	$ (10)		$ (46)		$ (46)	$ (84)
Net Income (Loss) Available to Common Stockholders, Diluted	$ (10)		$ (46)		$ (46)	$ (84)
Denominator [Abstract]
Weighted Average Shares Outstanding, Basic and Diluted	1,002		1,002		1,002	1,002
Basic and diluted earnings (loss) per share (in dollars per share)	$ (0.01)		$ (0.04)		$ (0.05)	$ (0.08)

Denominator used in the calculation to determine the amount of earnings per share of common stock [Abstract]

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Numerator used in the calculation to determine amount of earnings per share of common stock [Abstract]

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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