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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2017 $ 12 $ 134,738 $ (126,089) $ 8,661
Balance, shares at Dec. 31, 2017 1,180,276      
Issuance of shares in at-the-market transactions, net of fees $ 1 1,665 $ 1,666
Issuance of shares in at-the-market transactions, net of fees, shares 128,853     128,853
Issuance of shares to employees, net of shares withheld for taxes 379 $ 379
Issuance of shares to employees, net of shares withheld for taxes, shares 31,454      
Amortization of stock option awards 53 53
Net loss (1,040) (1,040)
Balance at Dec. 31, 2018 $ 13 136,835 (127,129) 9,719
Balance, shares at Dec. 31, 2018 1,340,583      
Amortization of stock option awards 41 41
Net loss (550) (550)
Balance at Dec. 31, 2019 $ 13 $ 136,876 $ (127,679) $ 9,210
Balance, shares at Dec. 31, 2019 1,340,583