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11. STOCK-BASED COMPENSATION (Details 1) - $ / shares | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Share-based Compensation [Abstract] |  |
Outstanding | 783,500 | 808,500
Range of Exercise Prices, Lower Limit | $ 1.44 |
Range of Exercise Prices, Upper Limit | $ 4.80 |
Weighted Average Remaining Contractual Life (Years) | 2 years 8 months 12 days |

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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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