Accounts Receivable and Significant Concentrations (Details 1)	6 Months Ended	12 Months Ended
Jun. 30, 2018	Dec. 31, 2017
U.S. Immigration and Customs Enforcement [Member]
Concentration Risk [Line Items]
As a % of Receivables	27.00%	27.00%
Accounts Receivable [Member] \| U.S. Customs Boarder Patrol [Member]
Concentration Risk [Line Items]
As a % of Receivables	6.00%	12.00%
Accounts Receivable [Member] \| U.S. Immigration and Customs Enforcement [Member]
Concentration Risk [Line Items]
As a % of Receivables	17.00%	13.00%
Accounts Receivable [Member] \| U.S. Federal Air Marshall Service [Member]
Concentration Risk [Line Items]
As a % of Receivables	11.00%	10.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration