Note 15 - Litigation (Details) - Aeroflex [Member] - USD ($)	1 Months Ended			9 Months Ended
	Jan. 31, 2018	Oct. 31, 2017	Mar. 31, 2017	Dec. 31, 2018
Note 15 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value		$ 2,100,000	$ 2,800,000
Loss Contingency, Estimate of Possible Loss		$ 4,900,000
Loss Contingency, Damages Sought	The Company filed motions in January 2018 for the Court to reconsider the amount of damages on the grounds that they are duplicative and not legally supportable. A hearing on this motion was held. The Judge rejected all of our arguments and declined to order a new trial. We filed the appeal document the week of May 28. The Company has posted a $2,000,000 bond. This $2 million bond amount will remain in place during the appeal process (See Note 5).
Restricted Cash	$ 2,000,000
Loss Contingency Accrual, Provision				$ 2,900,000
Business Opportunity [Member]
Note 15 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value			1,300,000
Non-Disclosure Agreements [Member]
Note 15 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value			525,000
Loss Contingency, Damages Sought, Value			1,500,000
Maximum [Member]
Note 15 - Litigation (Details) [Line Items]
Loss Contingency, Damages Sought, Value			$ 5,000,000