SUPPLEMENTARY DATA - QUARTERLY RESULTS OF OPERATION (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Schedule Of Quarterly Financial Information [Line Items] | ||||||||||
| Net revenues | $ 74 | $ 83 | $ 92 | $ 2,717 | $ 3,765 | $ 218 | $ 257 | $ 224 | $ 2,966 | $ 4,464 |
| Operating expenses | 1,828 | 2,145 | 2,083 | 2,135 | 2,036 | 2,287 | 3,336 | 3,362 | 8,191 | 11,021 |
| Operating (loss) income | (1,754) | (2,062) | (1,991) | 582 | 1,729 | (2,069) | (3,079) | (3,138) | (5,225) | (6,557) |
| Net (loss) income | $ (1,738) | $ (2,200) | $ (2,149) | $ 405 | $ 1,534 | $ (2,250) | $ (3,288) | $ (3,384) | $ (5,682) | $ (7,388) |
| Basic (loss) income per share | $ (0.08) | $ (0.12) | $ (0.18) | $ 0.03 | $ 0.13 | $ (0.19) | $ (0.28) | $ (0.28) | $ (0.36) | $ (0.62) |
| Diluted (loss) income per share | $ (0.08) | $ (0.12) | $ (0.18) | $ 0.03 | $ 0.13 | $ (0.19) | $ (0.28) | $ (0.28) | $ (0.36) | $ (0.62) |