Note 3 - Estimated Useful Lives of Finite Lived Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2015
Customer Relationships [Member] | Sigma [Member]
Estimated Useful Life	6 years
Customer Relationships [Member] | Thermonics [Member]
Estimated Useful Life	6 years
Remaining Estimated Useful Life	2 years 15 days
Computer Software, Intangible Asset [Member] | Sigma [Member]
Estimated Useful Life	10 years
Remaining Estimated Useful Life	2 years 270 days
Patented Technology [Member] | Sigma [Member]
Estimated Useful Life	5 years
Patented Technology [Member] | Thermonics [Member]
Estimated Useful Life	11 years
Remaining Estimated Useful Life	7 years 15 days
Trade Names [Member] | Thermonics [Member]
Estimated Useful Life	4 years
Remaining Estimated Useful Life	15 days