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Note 3 - Discontinued Operations - Summary of Discontinued Operation (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Impairment of net assets held for sale $ 7,007 $ 0  
Impairment of fixed assets 1,065 0  
Gain on termination of lease liabilities (1,098) 0  
Total current assets of discontinued operations 3,476   $ 1,931
Total non-current assets of discontinued operations 0   13,936 [1]
Total current liabilities of discontinued operations 3,278   4,620
Total non-current liabilities of discontinued operations 0   3,995
Gain on extinguishment of debt (400) 0  
DSUVIA [Member] | Discontinued Operations [Member]      
Total revenues 501 442  
Cost of goods sold 711 414  
Selling, general and administrative expense 683 3,608  
Impairment of net assets held for sale 7,007 0  
Impairment of fixed assets 1,065 0  
Gain on termination of lease liabilities (1,098) 0  
Research and development expenses 349 479  
Loss from operations 8,216 4,059  
Loss from discontinued operations before loss on disposal 8,216 4,059  
Cash and cash equivalents 0   0
Accounts receivable, net 276   309
Inventories 1,117   1,178
Prepaid expenses and other current assets 231   444
Property, plant and equipment, net 8,509   0
Operating lease right-of-use assets 178   0
Other assets 172   0
Less: expected loss on sale of discontinued operations (7,007)   0
Total current assets of discontinued operations 3,476   1,931
Property, plant and equipment, net 0   10,261
Operating lease right-of-use assets 0   3,499
Other assets 0   176
Total non-current assets of discontinued operations 0   13,936
Total assets of discontinued operations 3,476   15,867
Accounts payable 618   784
Accrued liabilities 1,184   1,720
Operating lease liabilities, current portion 354   1,601
Note payable, current portion 0   400
Deferred revenue, current portion 1,122   115
Total current liabilities of discontinued operations 3,278   4,620
Operating lease liabilities, net of current portion 0   2,959
Deferred revenue, net of current portion 0   1,036
Total non-current liabilities of discontinued operations 0   3,995
Total liabilities of discontinued operations 3,278   8,615
Net assets of discontinued operations 198   $ 7,252
Depreciation and amortization 215 379  
Stock-based compensation 19 145  
Gain on extinguishment of debt (400) $ 0  
Expected cash proceeds 2,723    
Less: net assets transferred (8,840)    
Less: expected disposal costs (890)    
Expected loss on sale of discontinued operations, before income taxes (7,007)    
Income tax expense 0    
Expected loss on sale of discontinued operations $ (7,007)    
[1] The condensed consolidated balance sheet as of December 31, 2020 has been derived from the audited financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.