v3.22.2.2
Note 11 - Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Oct. 12, 2022
Aug. 03, 2022
May 09, 2019
Sep. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Temporary Equity, Carrying Amount, Attributable to Parent       $ 315 $ 315   $ 0
Proceeds from Issuance of Common Stock         $ 192 $ 36,360  
Securities Purchase Agreement [Member]              
Proceeds from Issuance or Sale of Equity, Total   $ 300          
ATM Agreement [Member]              
Stock Issued During Period, Shares, New Issues (in shares)       40,000.00 40,000.00 200,000  
Aggregate Offering Price, Maximum     $ 80,000   $ 35,900    
Proceeds from Issuance of Common Stock       $ 200   $ 7,500  
August 2022 LPC Warrant [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   81,150          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 4.07          
Redeemable Convertible Preferred Stock [Member]              
Stock Issued During Period, Shares, New Issues (in shares)   3,000          
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.001          
Preferred Stock Stated Value Per Share (in dollars per share)   $ 100          
Temporary Equity, Carrying Amount, Attributable to Parent   $ 100          
Preferred Stock, Redemption Price Per Share (in dollars per share)   $ 3.70          
Preferred Stock, Company Option to Convert, Percentage of Stated Value   105.00%          
Preferred Stock, Purchaser Option to Convert, Percentage of Stated Value   110.00%          
Dividends, Preferred Stock, Total   $ 200   200      
Preferred Stock, Redemption Amount       $ 300 $ 300    
Reverse Stock Split, Preferred Stock Votes per Share   1,000,000          
Redeemable Convertible Preferred Stock [Member] | Subsequent Event [Member]              
Preferred Stock, Company Option to Convert, Percentage of Stated Value 105.00%            
Preferred Stock, Redemption Amount $ 300            
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 3,000            
Preferred Stock, Elimination of Designation, Shares (in shares) 3,000