Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2022
Sep. 30, 2022
Dec. 31, 2021
Stockholders' equity:      
Common stock, par value $ 0.001 $ 0.001  
Common stock, shares authorized 10,000,000 10,000,000  
Common stock, shares issued 3,074,833 3,074,833  
Common stock, shares outstanding 3,074,833 3,074,833  
Treasury stock, shares 645,681 645,681  
Intangible assets, net of accumulated amortization $ 2,400 $ 2,100  
Property and equipment, net of accumulated depreciation 29,100 26,700  
Inventories, net of reserves $ 2,400 2,400  
Trade receivables, net of allowance for doubtful account   $ 132 $ 152
Series E Convertible Preferred Stock      
Stockholders' equity:      
Preferred stock, shares authorized 200,000 200,000  
Preferred stock, issued 47,840 47,840  
Preferred stock, outstanding 47,840 47,840  
Preferred stock, liquidation preference per share $ 0.30 $ 0.30  
Treasury stock, shares 50,000 50,000