Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and Cash Equivalents	$ 848,146	$ 2,444,110
Accounts receivable less allowance for doubtful accounts	8,517,840	9,011,677
Costs and estimated earnings in excess of billing	2,393,431	1,605,991
Inventories-less allowance for obsolete inventory	3,905,941	3,903,481
Prepaid Expenses and other current assets	386,247	265,456
Total Current Assets	16,051,605	17,230,715
PROPERTY, PLANT AND EQUIPMENT:
Land and Improvements	235,179	235,179
Buildings and Leasehold Improvements	2,239,763	2,239,763
Machinery and Equipment	5,153,946	5,091,360
Total Property, Plant and Equipment	7,628,888	7,566,302
Less: Accumulated Depreciation	4,382,659	4,242,913
Property, Plant and Equipment, Net	3,246,229	3,323,389
OTHER ASSETS:
Goodwill	2,255,912	2,255,912
Intangibles, net of accumulated amortization	1,679,142	1,896,399
Deferred income taxes-less valuation allowance	2,173,892	2,173,892
Other non-current assets	3,250	3,250
Total Non-Current Other Assets	6,112,196	6,329,453
Total Assets	25,410,030	26,883,557
CURRENT LIABILITIES:
Convertible notes payable - related party	200,000	200,000
Notes payable - related party	428,455	352,727
Bank Debt - Current	500,000	500,000
Leases payable	56,529	55,735
Accounts payable	2,071,343	2,112,695
Unearned revenue	2,568,601	2,601,355
Accrued payroll and related expenses	648,901	723,053
Accrued expenses	1,209,408	1,340,465
Accrued income taxes	153,801	108,576
Total Current Liabilities	7,837,038	7,994,606
LONG-TERM LIABILITIES:
Notes payable - related party	3,538,603	3,651,765
Bank Debt	2,934,142	4,732,550
Leases payable	92,547	106,855
Total Long-Term Liabilities	6,565,292	8,491,170
STOCKHOLDERS' EQUITY
Preferred shares, no par value - 1,000,000 shares authorized, no shares issued and outstanding
Contributed capital	1,741,901	1,741,901
Treasury shares	(264,841)	(264,841)
Retained earnings	6,337,834	5,964,082
Total Stockholders' Equity	11,007,700	10,397,781
Total Liabilities and Stockholders' Equity	25,410,030	26,883,557
Common Class A [Member]
STOCKHOLDERS' EQUITY
Common stock	2,482,534	2,246,367
Common Class B [Member]
STOCKHOLDERS' EQUITY
Common stock	$ 710,272	$ 710,272