Note 4 - Inventory - Inventory (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Raw materials and component parts	$ 2,064,573	$ 2,637,138
Work-in-process	1,419,666	523,644
Finished products	1,861,375	1,200,204
Total Inventory	5,345,614	4,360,986
Less: inventory reserves	203,092	457,505
Net Inventory	$ 5,142,522	$ 3,903,481

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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