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FAIR VALUE MEASUREMENTS - Available for Sale (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
Available-for-sale securities  
Aggregate cost of available-for-sale securities $ 5,300
Gain on sale of available-for-sale securities (27,000)
Recurring  
Available-for-sale securities  
Amount of available-for-sale securities sold $ 33,000