6. STOCK-BASED COMPENSATION (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Stock-based Compensation Details | |||
| Number of options, outstanding and exercisable | 3,075 | 3,075 | 3,075 |
| Weighted average exercise price, outstanding and exercisable | $ 1,044 | $ 1,044 | $ 1,044 |
| Weighted- Average Remaining Contractual Term, outstanding and exercisable | 6 years 6 months 25 days | 5 years 6 months 25 days | 5 years 3 months 25 days |
| Aggregate intrinsic value, outstanding and exercisable | $ 0 | $ 0 | $ 0 |