Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 1,803	$ 4,319
Prepaid expenses and other current assets	256	1,060
Total current assets	2,059	5,379
Property and equipment, net	150	183
Restricted cash	9	150
Operating lease right-of-use assets	1,239	1,444
Intangible assets	25,250	25,250
Total assets	28,707	32,406
Current Liabilities:
Accounts payable	2,969	809
Accrued expenses	2,128	1,618
Operating lease liabilities - current portion	457	436
Senior secured notes payable	391	0
Loans payable	0	233
Other current liabilities	725	900
Total current liabilities	8,775	3,996
Operating lease liabilities - non-current portion	912	1,161
Restructured debt liability - contingent milestone payments	0	15,000
Other liabilities	3,800	3,800
Deferred tax liabilities	4,772	5,058
Total liabilities	18,259	29,015
Mezzanine Equity:
Series B redeemable preferred stock, $0.001 par value; 5,500 and 0 shares authorized; 5,500 and 0 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	6,954	0
Stockholders’ Equity:
Preferred stock, $0.001 par value; 4,994,500 and 5,000,000 shares authorized; 0 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	0	0
Common stock, $0.001 par value; 120,000,000 shares authorized; 591,910 and 333,145 shares issued at June 30, 2024 and December 31, 2023, respectively; 591,909 and 333,144 shares outstanding at June 30, 2024 and December 31, 2023, respectively	1	0
Additional paid-in capital	853,175	851,268
Accumulated deficit	(846,628)	(844,823)
Treasury stock (at cost); 1 share	(3,054)	(3,054)
Total stockholders’ equity	3,494	3,391
Total liabilities, mezzanine equity & stockholders’ equity	28,707	32,406
Series B Preferred Stock [Member]
Mezzanine Equity:
Series B redeemable preferred stock, $0.001 par value; 5,500 and 0 shares authorized; 5,500 and 0 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	6,954	0
Embedded Derivative Financial Instruments, Convertible Notes [Member]
Current Liabilities:
Derivative liability - senior convertible notes	202	0
Embedded Derivative Financial Instruments, Convertible Promissory Note [Member]
Current Liabilities:
Derivative liability - senior convertible notes	286	0
Senior Convertible Notes [Member]
Current Liabilities:
Convertible notes payable, current	1,311	0
June 2024 Commitment Note [Member]
Current Liabilities:
Convertible notes payable, current	$ 306	$ 0