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SHARE BASED COMPENSATION (Summary of Share Option Activity) (Details) ¥ / shares in Units, ¥ in Thousands | 12 Months Ended
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Dec. 31, 2018 CNY (¥) ¥ / shares shares | Dec. 31, 2018 CNY (¥) $ / shares ¥ / shares shares | Dec. 31, 2017 CNY (¥) ¥ / shares shares | Dec. 31, 2017 CNY (¥) $ / shares ¥ / shares shares | Dec. 31, 2016 CNY (¥) ¥ / shares shares | Dec. 31, 2016 CNY (¥) $ / shares ¥ / shares shares | Dec. 31, 2015 CNY (¥) ¥ / shares shares
Aggregate Intrinsic Value |  |  |  |  |  |  |
Aggregate Intrinsic Value | ¥ | ¥ 0 | ¥ 0 | ¥ 1,186 | ¥ 1,186 | ¥ 4,499 | ¥ 4,499 |
Employee and Directors Stock Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Available for future grants (in shares) |  |  | 941,978 | 941,978 |  |  |
Shares |  |  |  |  |  |  |
Outstanding at the beginning of the year (in shares) | 253,816 |  | 256,617 |  | 387,350 |  |
Granted (in shares) | 0 |  | 0 |  | 0 |  |
Exercised (in shares) | 0 |  | 0 |  | 0 |  |
Forfeited or expired (in shares) | 0 |  | (2,801) |  | (130,733) |  |
Converted (in shares) | (253,816) |  | 0 |  | 0 |  |
Outstanding at the end of the year (in shares) | 0 |  | 253,816 |  | 256,617 |  | 387,350
Exercisable at the end of the year (in shares) | 0 | 0 | 253,816 | 253,816 | 256,617 | 256,617 |
Expected to vested (in shares) | 0 | 0 | 0 | 0 | 0 | 0 |
Weighted Average Exercise Price |  |  |  |  |  |  |
Outstanding at the beginning of the year | ¥ / shares | ¥ 3.09 |  | ¥ 3.30 |  | ¥ 3.08 |  |
Granted | ¥ / shares | 0 |  | 0 |  | 0 |  |
Exercised | ¥ / shares | 0 |  | 0 |  | 0 |  |
Forfeited or expired | ¥ / shares | 0 |  | 3.09 |  | 3.30 |  |
Converted | $ / shares |  | ¥ 3.09 |  | ¥ 0 |  | ¥ 0 |
Outstanding at end of year | ¥ / shares | 0 |  | 3.09 |  | 3.30 |  | ¥ 3.08
Exercisable at end of year | ¥ / shares | ¥ 0 | ¥ 0 | ¥ 3.09 | ¥ 3.09 | ¥ 3.30 | ¥ 3.30 |
Weighted Average Remaining Contractual Term |  |  |  |  |  |  |
Outstanding at end of year |  |  | 1 year 10 months 10 days |  | 2 years 10 months 2 days |  | 2 years 7 months 2 days
Exercisable at end of year |  |  | 1 year 10 months 10 days |  | 2 years 10 months 2 days |  |
Aggregate Intrinsic Value |  |  |  |  |  |  |
Aggregate Intrinsic Value | ¥ |  |  |  |  |  |  | ¥ 3,836
Exercisable at end of year | ¥ | ¥ 0 |  | ¥ 1,186 |  | ¥ 4,499 |  |
Expected to be vested | ¥ | ¥ 0 | ¥ 0 | ¥ 0 | ¥ 0 | ¥ 0 | ¥ 0 |
Employee and Directors Stock Options [Member] | Employees [Member] |  |  |  |  |  |  |
Shares |  |  |  |  |  |  |
Outstanding at the beginning of the year (in shares) |  |  | 223,895 |  |  |  |
Outstanding at the end of the year (in shares) |  |  |  |  | 223,895 |  |
Employee and Directors Stock Options [Member] | Non Employees [Member] |  |  |  |  |  |  |
Shares |  |  |  |  |  |  |
Outstanding at the beginning of the year (in shares) |  |  | 29,921 |  |  |  |
Outstanding at the end of the year (in shares) |  |  |  |  | 29,921 |  |

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- Definition The addition or reduction in the number of reserved shares that could potentially be issued under the option plan attributable to reasons other than grants, exercises, forfeitures, and expirations during the reporting period. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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