Note 13 - Litigation (Details) - Aeroflex [Member] - USD ($)		1 Months Ended	7 Months Ended	9 Months Ended	12 Months Ended
	Nov. 22, 2017	Jan. 31, 2018	Jun. 30, 2018	Mar. 31, 2019	Mar. 31, 2018
Note 13 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value					$ 4,900,000
Litigation Case, Interest Rate on Damages Awarded			5.75%	6.50%
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). The Company believes it has solid grounds to appeal this verdict. The appeal process is anticipated to take several years to complete.
Restricted Cash		$ 2,000,000
Business Opportunity [Member]
Note 13 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value	$ 1,300,000
Non-Disclosure Agreements [Member]
Note 13 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value	1,500,000
Total Damages Award by Court [Member]
Note 13 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value	$ 2,800,000
Additional Punitive Damages [Member]
Note 13 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value					2,100,000
Loss Contingency, Damages Sought, Value					$ 5,000,000