STOCKHOLDERS' EQUITY (Details) - USD ($)	1 Months Ended	12 Months Ended		41 Months Ended	53 Months Ended
	Mar. 22, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2019	Jun. 10, 2019	Feb. 22, 2019	Jul. 30, 2015
Stock repurchase program, authorized amount								$ 10,000,000
Stock repurchased during period, shares	246,863			378,421	432,563
Payments for repurchase of common stock	$ 4,000	$ 4,545,000	$ 208,000	$ 7,579,000	$ 8,297,000
Payments for repurchase of common Stock, fees and expenses	$ 0
Common stock, shares authorized		20,000,000	10,000,000	10,000,000	20,000,000	20,000,000
Open Market Repurchases [Member]
Stock repurchased during period, shares		54,138	14,481
Payments for repurchase of common stock		$ 718,000	$ 208,000
Common stock
Approved tender offer, amount							$ 315,000
Approved tender offer, par value							$ 0.001
Approved tender offer, per share							$ 15.00