CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2018	$ 5,995,257	$ (32,345,002)	$ 24,326,778	$ 213,297,897	$ 486,543	$ 211,761,473
Increase (decrease) in shareholders' equity
Net Income (Loss)				18,550,919		18,550,919
Stock Repurchase		(31,096,662)				(31,096,662)
Vested Restricted Stock and Performance Shares	12,957		(316,272)			(303,315)
Stock Issuance	7,653		434,867			442,520
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			1,616,648			1,616,648
Cash Dividends				(1,564,523)		(1,564,523)
Other Comprehensive Loss, Net of Income Tax					(405,138)	(405,138)
Balance at Sep. 30, 2019	6,015,867	(63,441,664)	26,062,021	230,284,293	81,405	199,001,922
Balance at Jun. 30, 2019	6,014,536	(63,441,664)	25,450,060	229,333,766	143,712	197,500,410
Increase (decrease) in shareholders' equity
Net Income (Loss)				1,486,020		1,486,020
Stock Issuance	1,331		77,944			79,275
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			534,017			534,017
Cash Dividends				(535,493)		(535,493)
Other Comprehensive Loss, Net of Income Tax					(62,307)	(62,307)
Balance at Sep. 30, 2019	6,015,867	(63,441,664)	26,062,021	230,284,293	81,405	199,001,922
Balance at Dec. 31, 2019	6,017,218	(73,440,714)	26,689,795	326,073,199	73,924	285,413,422
Increase (decrease) in shareholders' equity
Net Income (Loss)				(1,172,839)		(1,172,839)
Stock Repurchase		(4,100,021)				(4,100,021)
Equity Component of Convertible Debt			5,247,550			5,247,550
Vested Restricted Stock and Performance Shares	23,892		(561,973)			(538,081)
Stock Issuance	8,143		416,257			424,400
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			1,710,878			1,710,878
Cash Dividends				(4,209,502)		(4,209,502)
Other Comprehensive Loss, Net of Income Tax					(1,793,495)	(1,793,495)
Balance at Sep. 30, 2020	6,049,253	(77,540,735)	33,502,507	320,690,858	(1,719,571)	280,982,312
Balance at Jun. 30, 2020	6,047,393	(77,540,735)	32,888,012	324,074,094	(1,792,237)	283,676,527
Increase (decrease) in shareholders' equity
Net Income (Loss)				(1,521,504)		(1,521,504)
Stock Issuance	1,860		71,610			73,470
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			542,885			542,885
Cash Dividends				(1,861,732)		(1,861,732)
Other Comprehensive Loss, Net of Income Tax					72,666	72,666
Balance at Sep. 30, 2020	$ 6,049,253	$ (77,540,735)	$ 33,502,507	$ 320,690,858	$ (1,719,571)	$ 280,982,312