Note 8. Concentrations (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016
Customer Concentration Risk [Member] | U.S. Government [Member] | Sales Revenue, Segment [Member]
Concentration Risk, Percentage	66.20%	41.90%
Customer Concentration Risk [Member] | Government Customers [Member]
Concentration Risk, Percentage	54.40%	29.00%
Number of Major Customers	3	2
Customer Concentration Risk [Member] | Commercial Customers [Member]] | Sales Revenue, Segment [Member]
Concentration Risk, Percentage	33.80%	58.10%
Customer Concentration Risk [Member] | Commercial Customers [Member]]
Concentration Risk, Percentage	30.30%	56.40%
Number of Major Customers	1	4
Number of Areas in Which Operations are Concentrated			1