Quarterly report pursuant to Section 13 or 15(d)

Note 19 - Subsequent Events (Details Textual)

v3.19.2
Note 19 - Subsequent Events (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 2 Months Ended 3 Months Ended 5 Months Ended
May 15, 2019
May 10, 2019
Mar. 26, 2019
May 15, 2019
Jul. 31, 2019
Apr. 30, 2019
Proceeds from Issuance of Common Stock           $ 96,901
Proceeds from Issuance of Long-term Debt, Total           $ 357,000
Term Loan Agreement [Member]            
Debt Agreement, Additional Borrowing Capacity Authorized     $ 40,000      
Forecast [Member]            
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs         $ 900  
Public Offering [Member] | Directors and Officers and Significant Stockholders, and Certain Other Investors [Member]            
Stock Issued During Period, Shares, New Issues 3,980,166          
Subsequent Event [Member]            
Net Proceeds from Issuance of Common Stock $ 78,200          
Shares Issued, Price Per Share $ 4.50     $ 4.50    
Underwriters Option to Purchase Additional Shares $ 9,000          
Proceeds from Issuance of Debt 60,000          
Subsequent Event [Member] | Term Loan Agreement [Member]            
Debt Agreement, Additional Borrowing Capacity Authorized   $ 20,000        
Proceeds from Issuance of Long-term Debt, Total $ 60,000 $ 60,000        
Subsequent Event [Member] | Public Offering [Member]            
Stock Issued During Period, Shares, New Issues 18,098,166          
Proceeds from Issuance of Common Stock $ 81,400          
Capital Pumping LP and Affiliates [Member] | Subsequent Event [Member]            
Business Combination, Consideration Transferred, Total       $ 129,200