STOCKHOLDERS' EQUITY (Details) - USD ($)	1 Months Ended	12 Months Ended		53 Months Ended
	Mar. 22, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2019	Mar. 27, 2020	Jun. 10, 2019	Feb. 22, 2019	Jul. 30, 2015
Stock repurchase program, authorized amount					$ 10,000			$ 10,000,000
Stock repurchased during period, shares	246,863			432,563
Payments for repurchase of common stock	$ 3,703,000	$ 2,239,000	$ 4,545,000	$ 8,297,000
Payments for repurchase of common Stock, fees and expenses	$ 125,000
Common stock, shares authorized (in shares)		20,000,000	20,000,000	20,000,000		20,000,000
Open Market Repurchases [Member]
Stock repurchased during period, shares		54,138
Payments for repurchase of common stock		$ 718,000
March 27, 2020 Program
Stock repurchase program, authorized amount					$ 2,238,000
Stock repurchase program, number of shares authorized to be repurchased					259,331
Cost					$ 1,000
Common Stock, $0.001 par value
Approved tender offer, amount							$ 315,000
Approved tender offer, par value							$ 0.001
Approved tender offer, per share							$ 15.00