Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Details)

v3.7.0.1
FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis $ 73,232 $ 73,470
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax (7) (2)
Available-for-sale Securities 73,225 73,468
Municipal Bonds and Notes [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 11,895 43,490
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax 2 0
Available-for-sale Securities 11,897 43,490
Corporate Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 16,312 1,673
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax (9) (2)
Available-for-sale Securities 16,303 1,671
Financial Institution Instruments [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 45,025 28,307
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax 0 0
Available-for-sale Securities $ 45,025 $ 28,307