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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Stock-based compensation	$ 2,118,718	$ 1,945,669
Unrecognized actuarial gains on postretirement plans, income tax expense	188,505	142,435
Reclassification of other comprehensive income due to termination of pension plan, income tax benefit		261,358
Station Operating Expenses [Member]
Stock-based compensation	359,657	266,015
Corporate General and Administrative Expenses [Member]
Stock-based compensation	$ 1,759,061	$ 1,679,654

X

- Definition

Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount of tax (expense) benefit for reclassification adjustment from accumulated other comprehensive (income) loss of defined benefit plan.

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- Definition

Amount of noncash expense for share-based payment arrangement.

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