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Note 16 - Leases (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 01, 2019
Nov. 30, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Lease, Right-of-Use Asset     $ 5,524  
Operating Lease, Right-of-Use Asset, Reclassified to Assets Held for Sale     $ 1,500    
Sale Leaseback Transaction, Rent Expense       16  
Accounting Standards Update 2016-02 [Member]          
Operating Lease, Right-of-Use Asset $ 7,700        
Selling, General and Administrative Expenses [Member]          
Operating Leases, Rent Expense, Net, Total $ 1,300     800  
Office and Warehouse Space in Houston [Member]          
Lessor, Operating Lease, Renewal Term     5 years    
Operating Leases, Monthly Rent     $ 33    
Energy Segment [Member] | Orbital UK Reporting Unit [Member]          
Operating Leases, Monthly Rent     $ 35    
Sale Leaseback Transaction to Sell Tualatin Headquarters And Warehouse [Member]          
Sale Leaseback Transaction, Net Proceeds, Investing Activities, Total       8,100  
Sale Leaseback Transaction, Cumulative Gain Recognized       2,900  
Sale Leaseback Transaction, Monthly Rental Payments       $ 53  
Lessor, Operating Lease, Renewal Term       5 years  
Vehicles, Equipment, and On Accommodations for Vesting Personnel [Member] | Energy Segment [Member] | Orbital UK Reporting Unit [Member]          
Operating Leases, Monthly Rent       $ 32  
Office and Warehouse Space in Houston [Member]          
Operating Leases, Monthly Rent         $ 10
Lease Related to Relocated to Another Rented Office and Warehouse [Member]          
Operating Leases, Monthly Rent   $ 30