STOCK-BASED COMPENSATION (Tables)
|12 Months Ended|
Dec. 31, 2015
|Stock-based Compensation Tables|
|Schedule of stock purchase right estimated on the date of grant using weighted average assumption||
Based on the Black-Scholes option pricing model, the weighted average estimated fair value of each of the purchase rights granted under the ASPP was $2.36 for 2015. For 2014 and 2013, the weighted average fair value purchase right granted was $2.12 and $2.21, respectively. In calculating compensation, the fair value of each stock purchase right was estimated on the date of grant using the following weighted average assumptions:
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.
Reference 1: http://www.xbrl.org/2003/role/presentationRef