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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
Jun. 30, 2023
Dec. 31, 2022
Preferred stock, shares authorized (in shares) 1,000,000  
Common Class A [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 11,849,710 11,807,893
Common stock, shares outstanding (in shares) 11,849,710 11,807,893
Common Class A [Member] | SPAC, Murphy Canyon Acquisition Corp. [Member]    
Temporary equity shares outstanding (in shares) 2,187,728 13,225,000
Temporary equity per share (in dollars per share) $ 10.45 $ 10.45
Temporary equity issuance cost $ 6,400,000 $ 6,400,000
Series D Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 901,375 913,987
Preferred stock, shares outstanding (in shares) 901,375 913,987
Preferred stock, liquidation preference (in dollars per share) $ 25.00 $ 25.00