SUBSEQUENT EVENTS (Details Textual) - USD ($)	1 Months Ended	3 Months Ended
	May 03, 2019	Mar. 31, 2019	Mar. 31, 2018
Subsequent Event [Line Items]
Stock Repurchased During Period, Value		$ 2,448,000	$ 2,951,000
Repurchase Of Common Stock Price Per Share		$ 2.24
Common Class D [Member]
Subsequent Event [Line Items]
Stock Repurchased During Period, Shares		1,220,657	1,568,246
Stock Repurchased During Period, Value		$ 1,000	$ 1,000
Subsequent Event [Member] | Common Class D [Member]
Subsequent Event [Line Items]
Stock Repurchased During Period, Shares	22,000
Stock Repurchased During Period, Value	$ 44,000
Repurchase Of Common Stock Price Per Share	$ 2.01
Subsequent Event [Member] | Common Class D [Member] | Stock Vest Tax Repurchase [Member]
Subsequent Event [Line Items]
Stock Repurchased During Period, Shares	6,368
Stock Repurchased During Period, Value	$ 12,000
Repurchase Of Common Stock Price Per Share	$ 1.98