Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 1,901,516	$ 1,247,627
Accounts receivable less allowance for doubtful accounts	23,601,359	21,884,807
Contract assets	4,141,609	3,284,301
Inventories less allowance for obsolete inventory	19,727,179	20,176,142
Investments	598,938	657,971
Prepaid expenses and other current assets	1,265,746	1,522,516
Total Current Assets	51,236,347	48,773,364
Property, plant and equipment, net	14,764,781	15,213,443
Operating right of use asset, net	9,172,854	9,524,280
OTHER ASSETS:
Goodwill	16,231,938	16,231,938
Intangibles, net of accumulated amortization	9,177,257	9,492,560
Other non-current assets	275,074	362,489
Total Non-Current Other Assets	25,684,269	26,086,987
Total Assets	100,858,251	99,598,074
CURRENT LIABILITIES:
Notes payable – current	753,057	1,303,972
Bank debt – current	0	222,222
Leases payable – current	1,292,604	1,705,224
Accounts payable	13,728,927	14,017,973
Unearned revenue	3,591,027	4,354,868
Accrued income taxes	2,411,460	1,239,289
Accrued expenses	3,731,771	3,224,188
Total Current Liabilities	25,508,846	26,067,736
LONG-TERM LIABILITIES:
Bank debt	17,357,593	19,224,318
Leases payable	8,125,657	8,060,152
Deferred income taxes	1,384,558	1,384,558
Total Long-Term Liabilities	28,521,548	30,515,433
STOCKHOLDERS' EQUITY
Contributed capital	1,741,901	1,741,901
Treasury shares	(2,196,437)	(2,125,252)
Retained earnings	37,972,643	34,581,171
Total Stockholders' Equity	46,827,857	43,014,905
Total Liabilities and Stockholders' Equity	100,858,251	99,598,074
Common Class A [Member]
STOCKHOLDERS' EQUITY
Common shares	7,844,228	7,351,563
Common Class B [Member]
STOCKHOLDERS' EQUITY
Common shares	1,465,522	1,465,522
Notes Payable Excluding Paycheck Protection Program Cares Act [Member]
LONG-TERM LIABILITIES:
Notes Payable, Noncurrent	$ 1,653,740	$ 1,846,405