Consolidated Balance Sheet (Current Period Unaudited) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 3,398,214	$ 1,494,415
Accounts receivable less allowance for doubtful accounts	23,366,493	18,387,744
Contract assets	2,233,467	2,111,057
Inventories-less allowance for obsolete inventory	16,750,211	16,585,437
Investments	1,693,129	1,518,244
Refundable tax asset	1,131,244	1,316,595
Prepaid expenses and other current assets	1,284,963	1,112,068
Total Current Assets	49,857,721	42,525,560
Property, plant and equipment, net	15,404,805	15,609,202
Operating right of use asset, net	9,157,599	8,998,776
OTHER ASSETS:
Goodwill	15,612,954	14,404,618
Intangibles, net of accumulated amortization	10,317,334	9,336,564
Other non-current assets	105,643	88,591
Total Non-Current Other Assets	26,035,931	23,829,773
Total Assets	100,456,056	90,963,311
CURRENT LIABILITIES:
Notes payable – current	2,946,885	2,946,885
Bank debt – current	1,111,111	1,444,444
Leases payable – current	1,645,264	1,241,681
Accounts payable	13,147,038	11,460,364
Unearned revenue	4,442,763	2,881,535
Contingent liability – short term	750,000	750,000
Accrued expenses	2,974,350	3,136,690
Total Current Liabilities	27,017,411	23,861,599
LONG-TERM LIABILITIES:
Bank debt	21,556,354	16,175,436
Leases payable	7,775,861	7,985,628
Contingent liability – long-term	750,000	750,000
Deferred income taxes	3,275,370	3,275,370
Total Long-Term Liabilities	36,900,271	32,461,811
STOCKHOLDERS' EQUITY
Contributed capital	1,741,901	1,741,901
Treasury shares	(2,046,822)	(1,981,113)
Retained earnings	29,085,643	28,019,768
Total Stockholders' Equity	36,538,374	34,639,901
Total Liabilities and Stockholders' Equity	100,456,056	90,963,311
Common Class A [Member]
STOCKHOLDERS' EQUITY
Common stock	6,292,130	5,393,823
Common Class B [Member]
STOCKHOLDERS' EQUITY
Common stock	1,465,522	1,465,522
Notes Payable Excluding Paycheck Protection Program Cares Act [Member]
LONG-TERM LIABILITIES:
Notes Payable, Noncurrent	$ 3,542,686	$ 4,275,377