2. STOCK-BASED COMPENSATION (Details) - Options Shares $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Outstanding | shares	97,543
Awarded | shares	0
Exercised | shares	(13,359)
Expired, forfeited or cancelled | shares	(35,135)
Outstanding | shares	31,008
Number of options vested | shares	41,913
Nonvested, Shares | shares	7,136
Weighted average exercise price, outstanding beginning | $ / shares	$ 11.26
Awarded | $ / shares	0.00
Exercised | $ / shares	9.23
Expired, forfeited or cancelled | $ / shares	15.67
Weighted average exercise price, outstanding ending | $ / shares	8.65
Weighted average exercise price of vested stock options (in dollars per share) | $ / shares	8.54
Weighted average exercise price of nonvested stock options (in dollars per share) | $ / shares	$ 9.29
Weighted years to maturity outstanding beginning	3 years 1 month 6 days
Weighted years to maturity outstanding Ending	3 years 7 months 6 days
Weighted average remaining contractual term in years, vested	3 years 2 months 12 days
Weighted average remaining contractual term in years, non-vested	6 years 2 months 12 days
Aggregate Intrinsic Value, options outstanding, beginning | $	$ 419
Aggregate Intrinsic Value, options outstanding, ending | $	327
Aggregate Intrinsic Value, options vested | $	284
Aggregate Intrinsic Value, options non-vested | $	$ 43