Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2018 11,956,874        
Balance at Dec. 31, 2018   $ 62,993 $ (45,968) $ 17,025
Share-based compensation expense   130 130
Unrealized gain on marketable securities   3 3
Net loss   (3,252) (3,252)
Balance (in shares) at Mar. 31, 2019 11,956,874        
Balance at Mar. 31, 2019   63,123 3 (49,220) 13,906
Balance (in shares) at Dec. 31, 2019 12,006,874        
Balance at Dec. 31, 2019   64,232 2 (56,617) 7,617
Issuance of common shares net of offering costs of $819 (in shares) 2,125,000        
Issuance of common shares net of offering costs of $819   7,682 7,682
Exercise of common stock options (in shares) 7,200        
Exercise of common stock options   16 16
Share-based compensation expense   393 393
Unrealized gain on marketable securities   40 40
Net loss   (2,425) (2,425)
Balance (in shares) at Mar. 31, 2020 14,139,074        
Balance at Mar. 31, 2020   $ 72,323 $ 42 $ (59,042) $ 13,323