Accounts Receivable and Significant Concentrations (Tables)

6 Months Ended

Jun. 30, 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:

	JUNE 30,		DECEMBER 31,
	2018		2017
	(Unaudited)
Government	$	4,363,451	$	6,055,397
Commercial		2,394,728		2,183,246
Gross accounts receivable		6,758,179		8,238,643
Less: allowances for doubtful
accounts		97,745		107,618
Accounts receivable, net	$	6,660,434	$	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 period:

	JUNE 30,		DECEMBER 31,
	2018		2017
	As a % of		As a % of
Customer Name	Receivables		Receivables
	(Unaudited)
U.S. Customs Border Patrol		6%		12%
U.S. Immigration and Customs Enforcement		17%		13%
U.S. Federal Air Marshall Service		11%		10%

Sales Revenue, Net [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 revenues in the current and/or comparative period:

	THREE MONTHS ENDED				SIX MONTHS ENDED
	JUNE 30,				JUNE 30,
	2018		2017		2018		2017
	As a % of		As a % of		As a % of		As a % of
Customer Name	Revenues		Revenues		Revenues		Revenues
	(Unaudited)
U.S. Immigration and Customs Enforcement		19%		17%		18%		16%
U.S. Customs Border Patrol		11%		–		–		12%