Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	[1]	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	[1]	Dec. 31, 2016	[1]
CURRENT ASSETS:
Cash	$ 15,905,158	$ 12,679,373	$ 24,070,351		$ 16,814,972	$ 18,955,328	$ 19,252,878	$ 18,082,857
Short-term Investments	9,152,166	5,006,578	0		0			0
Accounts receivable-trade, net of allowance for doubtful accounts of $15,940; $15,703; and $22,642 at December 31, 2019, 2018 and 2017, respectively	408,711	456,537	408,170		418,612	496,255	503,322	461,212
Inventory	24,041,827	30,174,483	33,302,549		38,411,757	35,122,333	34,277,634	34,546,084
Prepaid income taxes	1,628,985	308,458	419,908		65,794	0		0
Prepaid expenses	1,081,859	1,592,043	1,283,795		1,412,506	1,439,337	1,640,598	1,392,278
Other current assets	296,994	280,406	331,805		383,336	163,016	169,562	328,522
Total current assets	52,515,700	50,497,878	59,816,578		57,506,977	56,176,269	55,843,994	54,810,953
Property and equipment, at cost	27,470,545	27,902,207	28,140,345		27,983,667	27,585,125	27,436,922	27,332,299
Less accumulated depreciation	(14,551,645)	(13,941,530)	(13,625,261)		(12,993,965)	(12,569,534)	(12,177,897)	(11,765,416)
Property and equipment, net	12,918,900	13,960,677	14,515,084		14,989,702	15,015,591	15,259,025	15,566,883
Operating lease assets	13,897,422	16,769,384	0					0
Deferred income taxes	427,333	908,500	1,092,293		1,421,196	1,285,548	1,048,140	1,130,905
Goodwill	0	956,945	954,765		960,304	958,464	960,353	962,949
Other intangibles, net of accumulated amortization of $547,369; $690,869; and $688,147 at December 31, 2019, 2018 and 2017, respectively	7,000	15,833	16,500		17,166	18,083	18,667	19,222
Other assets	344,816	379,661	386,107		387,487	384,744	379,292	379,695
TOTAL ASSETS	80,111,171	83,488,878	76,781,327		75,282,832	73,838,699	73,509,471	72,870,607
CURRENT LIABILITIES:
Accounts payable-trade	5,752,613	897,196	2,154,394		3,718,393	3,115,778	2,922,764	2,409,845
Accrued expenses and other liabilities	2,656,718	4,107,279	5,401,508		3,409,797	3,136,191	3,546,711	5,045,015
Income taxes payable	0		0			153,593	491,771	354,629
Operating lease liabilities	3,822,748	4,048,161	0					0
Current maturities of long-term debt	0		519,516		174,056	1,740,556	1,153,931	614,311
Total current liabilities	12,232,079	9,052,636	8,075,418		7,302,246	8,146,118	8,115,177	8,423,800
Uncertain tax positions	296,127	1,415,715	1,415,715		1,197,078	1,197,078	1,197,078	1,197,078
Other non-current liabilities	508,907	555,778	555,296		598,188	597,716	597,243	596,770
Operating lease liabilities, non-current	10,654,631	13,234,659	0					0
Long-term debt, net of current maturities	0		8,448,502		8,180,613	6,614,112	6,758,739	6,757,419
COMMITMENTS AND CONTINGENCIES (Note 10)
STOCKHOLDERS' EQUITY:
Preferred stock, $0.10 par value; 20,000,000 shares authorized; none issued or outstanding; attributes to be determined on issuance	0	0	0		0	0	0	0
Common stock, $0.0024 par value; 25,000,000 shares authorized; 10,446,563; 10,353,155; and 10,320,069 shares issued at December 31, 2019, 2018, and 2017, respectively	25,072	24,851	24,848		24,808	24,808	24,808	24,768
Paid-in capital	5,037,102	4,452,960	4,267,138		4,015,996	3,992,237	3,968,518	3,939,589
Retained earnings	62,210,781	65,634,371	64,476,378		63,361,113	62,752,412	61,594,670	60,078,013
Treasury stock at cost (1,424,376; 1,292,594; and 1,049,207 shares at December 31, 2019, 2018 and 2017, respectively)	(9,772,982)	(9,752,400)	(9,037,783)		(8,379,755)	(8,379,703)	(7,925,457)	(7,384,517)
Accumulated other comprehensive loss (net of tax of $358,646; $480,112; and $240,045 at December 31, 2019, 2018 and 2017, respectively)	(1,080,546)	(1,129,692)	(1,444,185)		(1,017,455)	(1,106,079)	(821,305)	(762,313)
Total stockholders' equity	56,419,427	59,230,090	58,286,396		58,004,707	57,283,675	56,841,234	55,895,540		$ 52,542,666
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 80,111,171	$ 83,488,878	$ 76,781,327		$ 75,282,832	$ 73,838,699	$ 73,509,471	$ 72,870,607

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