Annual report pursuant to Section 13 and 15(d)

Note 2 - Business Acquisitions (Details Textual)

v3.19.1
Note 2 - Business Acquisitions (Details Textual)
$ in Thousands
12 Months Ended
Feb. 08, 2018
USD ($)
Apr. 28, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Cash Acquired from Acquisition     $ 1,943
Sea-cat Crewzer I and II [Member]          
Cash Acquired from Acquisition       $ 5,900  
Sea-Cat Crewzer [Member]          
Business Acquisition, Percentage of Voting Interests Acquired   100.00%      
Number of Equipment Operated   2 2    
Equity Method Investment, Ownership Percentage   50.00%      
Payments to Acquire Businesses, Gross   $ 4,400      
Sea-Cat Crewzer II [Member]          
Business Acquisition, Percentage of Voting Interests Acquired   100.00%      
Number of Equipment Operated   2 2    
Equity Method Investment, Ownership Percentage   50.00%      
Payments to Acquire Businesses, Gross   $ 11,300      
Falcon Global Holdings [Member]          
Joint Venture, Total Capital $ 112,500        
Joint Venture, Contribution from Previous Joint Venture 43,300        
Joint Venture, Contribution from Noncontrolling Interest $ 18,800        
Falcon Global Holdings [Member]          
Noncontrolling Interest, Ownership Percentage by Parent 72.00%   72.00%    
Business Acquisition, Percentage of Voting Interests Acquired   100.00%