Note 14 - Subsequent Events (Details Textual) - USD ($) $ in Thousands	1 Months Ended
	May 31, 2020	Apr. 30, 2020
Aerospace Products [Member]
Proceeds from Paycheck Protection Program Under CARES Act		$ 1,283
Aerospace Products [Member] | Subsequent Event [Member]
Payments for Paycheck Protection Program Under CARES Act	$ 1,283
Professional Services [Member] | Subsequent Event [Member]
Proceeds from Paycheck Protection Program Under CARES Act	$ 2,001