Accounts Receivable and Significant Concentrations (Tables)

3 Months Ended

Mar. 31, 2018

Schedule Of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

Accounts receivable consist of the following by customer type in the table below as of the periods presented:

	MARCH 31,		DECEMBER 31,
	2018		2017
	(Unaudited)
Government	$	4,291,669	$	6,055,397
Commercial		4,466,676		2,183,246
Gross accounts receivable		8,758,345		8,238,643
Less: allowances for doubtful accounts		101,947		107,618
Accounts receivable, net	$	8,656,398	$	8,131,025

Accounts Receivable [Member]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

The following table presents customers that represent ten (10) percent or more of consolidated trade accounts receivable in the current and/or comparative reporting period:

	MARCH 31,		DECEMBER 31,
	2018		2017
	As a % of		As a % of
Customer Name	Receivables		Receivables
	(Unaudited)
U.S. Customs Border and Protection		6%		12%
U.S. Immigration and Customs Enforcement		--		13%
U.S. Federal Air Marshall Service		4%		10%
Iron Bow Technologies		21%		--

Sales Revenue, Net [Member]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Customers representing ten percent or more of consolidated revenues are set forth in the table below for each of the periods presented:

	THREE MONTHS ENDED
	MARCH 31,
	2018			2017
	As a % of			As a % of
Customer Name	Revenues			Revenues
	(Unaudited)
U.S. Immigration and Customs Enforcement		17	%		15	%
U.S. Customs Boarder Patrol		--			15	%
U.S. Federal Air Marshall Service		11	%		--