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Accounts Receivable and Significant Concentrations (Tables) | 3 Months Ended
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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 | % |  | -- |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6442-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6327-108592 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 + Details
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