v3.19.3
Note 13 - Related-party Transactions (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
May 03, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Chief Executive Officer [Member] | Severance Pay [Member]          
Related Party Transaction, Amounts of Transaction $ 1,091,000        
Majority Investors [Member] | Convertible Debt [Member]          
Notes Payable, Related Parties   $ 6,400,000   $ 6,400,000  
Interest Expense, Related Party   $ 122,000 $ 31,000 $ 325,000 $ 62,000