Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited)

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Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Receivables, allowance for doubtful accounts $ 42 $ 42
Property and equipment, accumulated depreciation and amortization $ 1,413 $ 1,376
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 29,750,000 29,750,000
Common stock, shares issued (in shares) 17,590,586 13,780,823
Common stock, shares outstanding (in shares) 17,590,586 13,780,823
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 250,000 250,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0