INCOME TAXES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
INCOME TAXES
Effective income tax rate (as a percent)	92.90%	27.70%	87.40%	26.80%
Reconciliation of federal income taxes and reported income taxes
Statutory federal tax provision benefit	$ (74,500)	$ (89,000)	$ (81,000)	$ (55,000)
State income tax expense (benefit)	(6,900)	13,000	(500)	16,000
Income tax credits	(25,000)	(17,000)	(50,000)	(40,000)
Change in uncertain tax positions	2,500		5,000
Foreign tax benefit	(96,300)		(82,000)
Other	(5,400)	24,000	(1,500)	36,000
Income tax benefit	(205,956)	$ (69,000)	(210,404)	$ (43,000)
Unrecognized tax benefits
Net uncertain tax benefit positions that would increase (reduce) effective income tax rate, if recognized	$ 57,000		$ 57,000		$ 52,000