Note 14 - Litigation (Details) - USD ($)		1 Months Ended		6 Months Ended
	Nov. 10, 2017	Oct. 31, 2017	Mar. 31, 2017	Sep. 30, 2017
Note 14 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value				$ 2,100,000
Aeroflex [Member]
Note 14 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value			$ 2,800,000
Loss Contingency, Damages Sought			the Company has approximately 30 days to file an appeal or request a new trial. If the Company files the appeal on its own, it will be required to post a bond equal to the lesser of: (1) the final damages award; or (2) $1 million plus 25% of the amount of the verdict in excess of $1 million, which would currently total $1.975 million.
Business Opportunity [Member] | Aeroflex [Member]
Note 14 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value			$ 1,300,000
Non-Disclosure Agreements [Member] | Aeroflex [Member]
Note 14 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value			525,000
Loss Contingency, Damages Sought, Value			1,500,000
Maximum [Member] | Aeroflex [Member]
Note 14 - Litigation (Details) [Line Items]
Loss Contingency, Damages Sought, Value			$ 5,000,000
Subsequent Event [Member]
Note 14 - Litigation (Details) [Line Items]
Proceeds from Issuance of Convertible Preferred Stock	$ 3,000,000
Subsequent Event [Member] | Aeroflex [Member]
Note 14 - Litigation (Details) [Line Items]
Loss Contingency, Damages Awarded, Value		$ 2,100,000
Loss Contingency, Estimate of Possible Loss		$ 4,900,000