XML 51 R36.htm IDEA: XBRL DOCUMENT v3.20.1
Note 2 - Summary of Significant Accounting Policies (Details Textual)
12 Months Ended
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Jan. 01, 2019
USD ($)
Feb. 23, 2018
USD ($)
Net Income (Loss) Attributable to Parent, Total $ (7,652,000) $ (5,865,000)    
Liabilities, Current, Total 39,738,000 7,452,000    
Assets, Current, Total 8,731,000 13,530,000    
Working Capital Deficit 31,000,000      
Line of Credit, Current 33,994,000    
Accounts Receivable, Allowance for Credit Loss, Current 246,000 116,000    
Accounts Receivable, Credit Loss Expense (Reversal) 160,000 31,000    
Inventory Write-down 0 0    
Asset Impairment Charges, Total $ 127,000 $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Outstanding, Number | shares 2,600,333 2,574,665    
Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Outstanding, Aggregate Intrinsic Value $ 0 $ 93,000    
Payments of Dividends, Total 0      
Operating Lease, Liability, Total $ 4,381,000   $ 2,400,000  
Accounting Standards Update 2016-02 [Member]        
Operating Lease, Liability, Total     $ 2,400,000  
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]        
Open Tax Year 2016 2017 2018 2019      
State and Local Jurisdiction [Member]        
Open Tax Year 2015 2016 2017 2018 2019      
Interest Rate Swap [Member] | Cash Flow Hedging [Member]        
Derivative, Notional Amount       $ 10,000,000
Derivative, Fixed Interest Rate       2.52%
The 2017 Credit Agreement [Member]        
Debt Issuance Costs, Net, Total $ 82,000      
Disposal Wells [Member]        
Asset Impairment Charges, Total $ 127,000      
Minimum [Member]        
Property, Plant and Equipment, Useful Life 5 years      
Maximum [Member]        
Property, Plant and Equipment, Useful Life 30 years      
Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Number of Major Customers 2      
Concentration Risk, Percentage 10.00%      
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer A [Member]        
Concentration Risk, Percentage 16.00% 10.00%    
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer B [Member]        
Concentration Risk, Percentage 11.00%      
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer C [Member]        
Concentration Risk, Percentage 11.00%