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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Common Stock [Member]
Preferred Stock
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2018 $ 1 $ 1 $ 48,017 $ (42,144) $ 5,875
Balance (in shares) at Dec. 31, 2018 7,580 105      
Common stock issued in exchange for exercise of warrants and options on a cashless basis     42   42
Common stock issued in exchange for exercise of warrants and options on a cashless basis (in shares) 43        
Restricted stock units, warrants and options issued for services     449   449
Net loss       (2,141) (2,141)
Balance at Mar. 31, 2019 $ 1 $ 1 48,508 (44,285) 4,225
Balance (in shares) at Mar. 31, 2019 7,623 105      
Balance at Dec. 31, 2019 $ 1 $ 1 51,490 (49,926) 1,566
Balance (in shares) at Dec. 31, 2019 8,877 105      
Restricted stock units, warrants and options issued for services     256   256
Net loss       (1,664) (1,664)
Balance at Mar. 31, 2020 $ 1 $ 1 $ 51,746 $ (51,590) $ 158
Balance (in shares) at Mar. 31, 2020 8,877 105