RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS, Consolidated Balance Sheets (Details) - USD ($)	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
CURRENT ASSETS: [Abstract]
Cash and cash equivalents	$ 15,905,158	$ 12,679,373	$ 24,070,351	[1]	$ 16,814,972	$ 18,955,328	$ 19,252,878	$ 18,082,857	[1]
Short-term Investments	9,152,166	5,006,578	0	[1]	0			0	[1]
Accounts receivable-trade, net of allowance for doubtful accounts	408,711	456,537	408,170	[1]	418,612	496,255	503,322	461,212	[1]
Inventory	24,041,827	30,174,483	33,302,549	[1]	38,411,757	35,122,333	34,277,634	34,546,084	[1]
Prepaid income taxes	1,628,985	308,458	419,908	[1]	65,794	0		0	[1]
Prepaid expenses	1,081,859	1,592,043	1,283,795	[1]	1,412,506	1,439,337	1,640,598	1,392,278	[1]
Other current assets	296,994	280,406	331,805	[1]	383,336	163,016	169,562	328,522	[1]
Total current assets	52,515,700	50,497,878	59,816,578	[1]	57,506,977	56,176,269	55,843,994	54,810,953	[1]
Property and equipment, at cost	27,470,545	27,902,207	28,140,345	[1]	27,983,667	27,585,125	27,436,922	27,332,299	[1]
Less accumulated depreciation	(14,551,645)	(13,941,530)	(13,625,261)	[1]	(12,993,965)	(12,569,534)	(12,177,897)	(11,765,416)	[1]
Property and equipment, net	12,918,900	13,960,677	14,515,084	[1]	14,989,702	15,015,591	15,259,025	15,566,883	[1]
Operating lease assets	13,897,422	16,769,384	0	[1]				0	[1]
Deferred income taxes	427,333	908,500	1,092,293	[1]	1,421,196	1,285,548	1,048,140	1,130,905	[1]
Goodwill	0	956,945	954,765	[1]	960,304	958,464	960,353	962,949	[1]
Other intangibles, net of accumulated amortization	7,000	15,833	16,500	[1]	17,166	18,083	18,667	19,222	[1]
Other assets	344,816	379,661	386,107	[1]	387,487	384,744	379,292	379,695	[1]
TOTAL ASSETS	80,111,171	83,488,878	76,781,327	[1]	75,282,832	73,838,699	73,509,471	72,870,607	[1]
CURRENT LIABILITIES: [Abstract]
Accounts payable-trade	5,752,613	897,196	2,154,394	[1]	3,718,393	3,115,778	2,922,764	2,409,845	[1]
Accrued expenses and other liabilities	2,656,718	4,107,279	5,401,508	[1]	3,409,797	3,136,191	3,546,711	5,045,015	[1]
Income taxes payable	0		0	[1]		153,593	491,771	354,629	[1]
Operating lease liabilities	3,822,748	4,048,161	0	[1]				0	[1]
Current maturities of long-term debt	0		519,516	[1]	174,056	1,740,556	1,153,931	614,311	[1]
Total current liabilities	12,232,079	9,052,636	8,075,418	[1]	7,302,246	8,146,118	8,115,177	8,423,800	[1]
Uncertain tax positions	296,127	1,415,715	1,415,715	[1]	1,197,078	1,197,078	1,197,078	1,197,078	[1]
Deferred income taxes		0	0		0	0	0	0
Other non-current liabilities	508,907	555,778	555,296	[1]	598,188	597,716	597,243	596,770	[1]
Operating lease liabilities, non-current	10,654,631	13,234,659	0	[1]				0	[1]
Long-term debt, net of current maturities	0		8,448,502	[1]	8,180,613	6,614,112	6,758,739	6,757,419	[1]
COMMITMENTS AND CONTINGENCIES				[1]					[1]
STOCKHOLDERS' EQUITY: [Abstract]
Preferred stock	0	0	0	[1]	0	0	0	0	[1]
Common stock	25,072	24,851	24,848	[1]	24,808	24,808	24,808	24,768	[1]
Paid-in capital	5,037,102	4,452,960	4,267,138	[1]	4,015,996	3,992,237	3,968,518	3,939,589	[1]
Retained earnings	62,210,781	65,634,371	64,476,378	[1]	63,361,113	62,752,412	61,594,670	60,078,013	[1]
Treasury stock	(9,772,982)	(9,752,400)	(9,037,783)	[1]	(8,379,755)	(8,379,703)	(7,925,457)	(7,384,517)	[1]
Accumulated other comprehensive loss (net of tax)	(1,080,546)	(1,129,692)	(1,444,185)	[1]	(1,017,455)	(1,106,079)	(821,305)	(762,313)	[1]
Total stockholders' equity	56,419,427	59,230,090	58,286,396	[1]	58,004,707	57,283,675	56,841,234	55,895,540	[1]	$ 52,542,666	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 80,111,171	83,488,878	76,781,327	[1]	75,282,832	73,838,699	73,509,471	72,870,607	[1]
As Reported [Member]
CURRENT ASSETS: [Abstract]
Cash and cash equivalents		12,679,373	24,070,351		16,814,972	18,955,328	19,252,878	18,337,258
Short-term Investments		4,999,750			0
Accounts receivable-trade, net of allowance for doubtful accounts		456,537	408,170		418,612	496,255	503,322	461,212
Inventory		30,564,322	33,867,276		40,720,630	38,020,269	36,771,860	37,311,197
Prepaid income taxes		272,028	383,478		452,389	233,002		41,307
Prepaid expenses		1,537,367	1,244,754		1,348,113	1,374,944	1,576,205	1,473,147
Other current assets		174,043	161,208		290,028	75,459	78,412	189,029
Total current assets		50,683,420	60,135,237		60,044,744	59,155,257	58,182,677	57,813,150
Property and equipment, at cost		27,863,939	28,005,563		27,950,353	27,551,811	27,403,608	27,218,481
Less accumulated depreciation		(13,921,523)	(13,606,266)		(12,976,025)	(12,552,648)	(12,162,066)	(11,750,639)
Property and equipment, net		13,942,416	14,399,297		14,974,328	14,999,163	15,241,542	15,467,842
Operating lease assets		6,389,561
Deferred income taxes		0	248,228		281,721	269,512	265,456	271,738
Goodwill		956,945	954,765		960,304	958,464	960,353	962,949
Other intangibles, net of accumulated amortization		15,833	16,500		17,166	18,083	18,667	19,222
Other assets		379,661	386,107		387,487	384,744	379,292	379,695
TOTAL ASSETS		72,367,836	76,140,134		76,665,750	75,785,223	75,047,987	74,914,596
CURRENT LIABILITIES: [Abstract]
Accounts payable-trade		897,196	1,978,840		3,718,393	3,115,778	2,922,764	2,480,593
Accrued expenses and other liabilities		3,752,711	4,176,479		2,235,793	1,971,026	2,372,090	3,886,334
Income taxes payable						0	105,176	0
Operating lease liabilities		3,340,843
Current maturities of long-term debt			747,335		174,056	1,740,556	1,153,931	614,311
Total current liabilities		7,990,750	6,902,654		6,128,242	6,827,360	6,553,961	6,981,238
Uncertain tax positions		0	0		0	0	0	0
Deferred income taxes		1,258,721	1,556,493		1,467,481	1,474,675	1,581,178	1,636,958
Other non-current liabilities		0	0		0	0	0	0
Operating lease liabilities, non-current		3,427,705
Long-term debt, net of current maturities			8,220,683		8,180,613	6,614,112	6,758,739	6,757,419
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY: [Abstract]
Preferred stock		0	0		0	0	0	0
Common stock		27,234	27,232		27,193	27,193	27,193	27,153
Paid-in capital		7,344,644	7,158,821		6,907,678	6,883,919	6,860,200	6,831,271
Retained earnings		66,188,614	65,716,761		66,345,110	66,466,644	65,026,552	63,921,244
Treasury stock		(12,646,467)	(11,931,850)		(11,273,822)	(11,273,770)	(10,819,524)	(10,278,584)
Accumulated other comprehensive loss (net of tax)		(1,223,365)	(1,510,660)		(1,116,745)	(1,234,910)	(940,312)	(962,103)
Total stockholders' equity		59,690,660	59,460,304		60,889,414	60,869,076	60,154,109	59,538,981		53,693,201
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		72,367,836	76,140,134		76,665,750	75,785,223	75,047,987	74,914,596
Adjustments [Member]
CURRENT ASSETS: [Abstract]
Cash and cash equivalents		0	0		0	0	0	(254,401)
Short-term Investments		6,828			0
Accounts receivable-trade, net of allowance for doubtful accounts		0	0		0	0	0	0
Inventory		(389,839)	(564,727)		(2,308,873)	(2,897,936)	(2,494,226)	(2,765,113)
Prepaid income taxes		36,430	36,430		(386,595)	(233,002)		(41,307)
Prepaid expenses		54,676	39,041		64,393	64,393	64,393	(80,869)
Other current assets		106,363	170,597		93,308	87,557	91,150	139,493
Total current assets		(185,542)	(318,659)		(2,537,767)	(2,978,988)	(2,338,683)	(3,002,197)
Property and equipment, at cost		38,268	134,782		33,314	33,314	33,314	113,818
Less accumulated depreciation		(20,007)	(18,995)		(17,940)	(16,886)	(15,831)	(14,777)
Property and equipment, net		18,261	115,787		15,374	16,428	17,483	99,041
Operating lease assets		10,379,823
Deferred income taxes		908,500	844,065		1,139,475	1,016,036	782,684	859,167
Goodwill		0	0		0	0	0	0
Other intangibles, net of accumulated amortization		0	0		0	0	0	0
Other assets		0	0		0	0	0	0
TOTAL ASSETS		11,121,042	641,193		(1,382,918)	(1,946,524)	(1,538,516)	(2,043,989)
CURRENT LIABILITIES: [Abstract]
Accounts payable-trade		0	175,554		0	0	0	(70,748)
Accrued expenses and other liabilities		354,568	1,225,029		1,174,004	1,165,165	1,174,621	1,158,681
Income taxes payable						153,593	386,595	354,629
Operating lease liabilities		707,318
Current maturities of long-term debt			(227,819)		0	0	0	0
Total current liabilities		1,061,886	1,172,764		1,174,004	1,318,758	1,561,216	1,442,562
Uncertain tax positions		1,415,715	1,415,715		1,197,078	1,197,078	1,197,078	1,197,078
Deferred income taxes		(1,258,721)	(1,556,493)		(1,467,481)	(1,474,675)	(1,581,178)	(1,636,958)
Other non-current liabilities		555,778	555,296		598,188	597,716	597,243	596,770
Operating lease liabilities, non-current		9,806,954
Long-term debt, net of current maturities			227,819		0	0	0	0
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY: [Abstract]
Preferred stock		0	0		0	0	0	0
Common stock		(2,383)	(2,384)		(2,385)	(2,385)	(2,385)	(2,385)
Paid-in capital		(2,891,684)	(2,891,683)		(2,891,682)	(2,891,682)	(2,891,682)	(2,891,682)
Retained earnings		(554,243)	(1,240,383)		(2,983,997)	(3,714,232)	(3,431,882)	(3,843,231)
Treasury stock		2,894,067	2,894,067		2,894,067	2,894,067	2,894,067	2,894,067
Accumulated other comprehensive loss (net of tax)		93,673	66,475		99,290	128,831	119,007	199,790
Total stockholders' equity		(460,570)	(1,173,908)		(2,884,707)	(3,585,401)	(3,312,875)	(3,643,441)		$ (1,150,535)	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		$ 11,121,042	$ 641,193		$ (1,382,918)	$ (1,946,524)	$ (1,538,516)	$ (2,043,989)

[1] As described in Note 2 to these Consolidated Financial Statements, we have restated the Consolidated Financial Statements.