CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) [Abstract]
Net income (loss)	$ 419,629	$ (2,664,767)	$ (790,788)	$ (3,631,175)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	109,348	(50,278)	130,772	(24,622)
Unrealized loss on available-for-sale investments	8,065	0	7,860	0
Pension adjustments	(4,041)	12,491	(5,609)	3,917
Total other comprehensive income (loss), net of tax	113,372	(37,787)	133,023	(20,705)
Comprehensive income (loss)	$ 533,001	$ (2,702,554)	$ (657,765)	$ (3,651,880)