CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Common stock	Additional paid-in capital	Accumulated deficit	Notes receivable from stockholders	Accumulated other comprehensive income
Beginning balance at Dec. 31, 2017	$ 71,093,218	$ 263,951	$ 250,826,873	$ (181,568,757)	$ (908,054)	$ 2,479,205
Beginning balance (in shares) at Dec. 31, 2017		26,395,048
Stock based compensation	108,495		108,495
Restricted stock issued	0	$ 410	(410)
Restricted stock issued (in shares)		41,000
Restricted stock units vested, net of taxes	(54,155)	$ 497	(54,652)
Restricted stock units vested, net of taxes (in shares)		49,747
Restricted stock forfeitures	0	$ (333)	333
Restricted stock forfeitures (in shares)		(33,333)
Foreign currency translation adjustment	(24,260)					(24,260)
Net income (loss)	595,589			595,589
Ending balance at Mar. 31, 2018	71,718,887	$ 264,525	250,880,639	(180,973,168)	(908,054)	2,454,945
Ending balance (in shares) at Mar. 31, 2018		26,452,462
Beginning balance at Dec. 31, 2018	$ 76,775,717	$ 264,862	251,551,001	(176,498,057)	(908,054)	2,365,965
Beginning balance (in shares) at Dec. 31, 2018	26,486,152	26,486,152
Stock based compensation	$ 135,969		135,969
Restricted stock issued	0	$ 240	(240)
Restricted stock issued (in shares)		24,000
Restricted stock units vested, net of taxes	(112,921)	$ 1,128	(114,049)
Restricted stock units vested, net of taxes (in shares)		112,775
Restricted stock forfeitures	0	$ (55)	55
Restricted stock forfeitures (in shares)		(5,467)
Foreign currency translation adjustment	42,892					42,892
Net income (loss)	(1,407,013)			(1,407,013)
Ending balance at Mar. 31, 2019	$ 75,434,644	$ 266,175	$ 251,572,736	$ (177,905,070)	$ (908,054)	$ 2,408,857
Ending balance (in shares) at Mar. 31, 2019	26,617,460	26,617,460