CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance, shares at Dec. 31, 2017	54,962,535
Beginning balance, value at Dec. 31, 2017	$ 550		$ 36,848,041	$ (32,596,374)	$ 8,454	$ 4,260,671
Exercise of options, shares	1,089,144
Exercise of options, value	$ 11		264,346			264,357
Agent growth incentive stock compensation expense, shares	61,598
Agent growth incentive stock compensation expense, value			8,279,108			8,279,108
Stock option expense			1,301,702			1,301,702
Agent equity program, shares	208,324
Agent equity program, value	$ 2		2,370,002			2,370,004
Foreign currency translation gain (loss)					(1,275)	(1,275)
Net loss				(10,696,345)		(10,696,345)
Ending balance, shares at Mar. 31, 2018	56,321,601
Ending balance, value at Mar. 31, 2018	$ 563		49,063,199	(43,292,719)	7,179	5,778,222
Beginning balance, shares at Dec. 31, 2017	54,962,535
Beginning balance, value at Dec. 31, 2017	$ 550		36,848,041	(32,596,374)	8,454	4,260,671
Foreign currency translation gain (loss)						(2,201)
Net loss						(17,211,174)
Ending balance, shares at Sep. 30, 2018	58,968,762
Ending balance, value at Sep. 30, 2018	$ 589		79,195,251	(55,557,542)	6,253	23,644,551
Beginning balance, shares at Dec. 31, 2017	54,962,535
Beginning balance, value at Dec. 31, 2017	$ 550		36,848,041	(32,596,374)	8,454	4,260,671
Ending balance, shares at Dec. 31, 2018	60,609,102
Ending balance, value at Dec. 31, 2018	$ 606		90,755,616	(60,765,266)	(11,327)	29,979,629
Beginning balance, shares at Mar. 31, 2018	56,321,601
Beginning balance, value at Mar. 31, 2018	$ 563		49,063,199	(43,292,719)	7,179	5,778,222
Exercise of options, shares	710,447
Exercise of options, value	$ 7		608,895			608,902
Agent growth incentive stock compensation expense, shares	69,401
Agent growth incentive stock compensation expense, value	$ 1		3,989,602			3,989,603
Stock option expense			1,181,969			1,181,969
Agent equity program, shares	373,573
Agent equity program, value	$ 4		5,277,342			5,277,346
Foreign currency translation gain (loss)					9,795	9,795
Net loss				(1,886,658)		(1,886,658)
Ending balance, shares at Jun. 30, 2018	57,475,022
Ending balance, value at Jun. 30, 2018	$ 575		60,121,007	(45,179,377)	16,974	14,959,179
Other			18,011	(11,458)		6,553
Exercise of options, shares	474,696
Exercise of options, value	$ 5		876,632			876,637
Agent growth incentive stock compensation expense, shares	611,843
Agent growth incentive stock compensation expense, value	$ 5		4,238,662			4,238,667
Stock option expense			1,103,055			1,103,055
Agent equity program, shares	407,201
Agent equity program, value	$ 4		7,099,348			7,099,352
Foreign currency translation gain (loss)					(10,721)	(10,721)
Net loss				(4,628,171)		(4,628,171)
Ending balance, shares at Sep. 30, 2018	58,968,762
Ending balance, value at Sep. 30, 2018	$ 589		79,195,251	(55,557,542)	6,253	23,644,551
Cumulative effect of new accounting principle in period of adoption | Accounting Standards Update 2018-07 [Member]			5,738,536	(5,738,536)
Beginning balance, shares at Dec. 31, 2018	60,609,102
Beginning balance, value at Dec. 31, 2018	$ 606		90,755,616	(60,765,266)	(11,327)	29,979,629
Exercise of options, shares	134,260
Exercise of options, value	$ 1		215,725			215,726
Agent growth incentive stock compensation expense, shares	136,194
Agent growth incentive stock compensation expense, value	$ 1		3,669,320			3,669,321
Stock option expense			1,215,448			1,215,448
Agent equity program, shares	620,287
Agent equity program, value	$ 4		6,210,289			6,210,293
Foreign currency translation gain (loss)					14,860	14,860
Repurchase of common stock, shares		357,752
Repurchase of common stock, value		$ (3,647,076)				(3,647,076)
Net loss				(6,295,823)		(6,295,823)
Ending balance, shares at Mar. 31, 2019	61,499,843	357,752
Ending balance, value at Mar. 31, 2019	$ 612	$ (3,647,076)	102,066,398	(67,061,089)	3,533	31,362,378
Beginning balance, shares at Dec. 31, 2018	60,609,102
Beginning balance, value at Dec. 31, 2018	$ 606		90,755,616	(60,765,266)	(11,327)	29,979,629
Foreign currency translation gain (loss)						$ 139,534
Repurchase of common stock, shares						1,785,945
Repurchase of common stock, value						$ (17,649,014)
Net loss						(10,338,927)
Ending balance, shares at Sep. 30, 2019	66,476,020	1,785,945
Ending balance, value at Sep. 30, 2019	$ 665	$ (17,649,014)	133,827,909	(71,104,193)	128,207	45,203,574
Beginning balance, shares at Mar. 31, 2019	61,499,843	357,752
Beginning balance, value at Mar. 31, 2019	$ 612	$ (3,647,076)	102,066,398	(67,061,089)	3,533	31,362,378
Exercise of options, shares	536,613
Exercise of options, value	$ 5		690,262			690,267
Agent growth incentive stock compensation expense, shares	149,008
Agent growth incentive stock compensation expense, value	$ 2		3,587,463			3,587,465
Stock option expense			1,830,508			1,830,508
Agent equity program, shares	935,177
Agent equity program, value	$ 12		10,233,901			10,233,913
Foreign currency translation gain (loss)					47,812	47,812
Repurchase of common stock, shares		460,093
Repurchase of common stock, value		$ (4,897,976)				(4,897,976)
Net loss				(2,195,741)		(2,195,741)
Ending balance, shares at Jun. 30, 2019	63,120,641	817,845
Ending balance, value at Jun. 30, 2019	$ 631	$ (8,545,052)	118,408,532	(69,256,830)	51,345	40,658,626
Exercise of options, shares	1,224,756
Exercise of options, value	$ 12		646,152			646,164
Agent growth incentive stock compensation expense, shares	878,083
Agent growth incentive stock compensation expense, value	$ 9		2,602,692			2,602,701
Stock option expense			1,060,175			1,060,175
Agent equity program, shares	1,252,540
Agent equity program, value	$ 13		11,110,358			11,110,371
Foreign currency translation gain (loss)					76,862	76,862
Repurchase of common stock, shares		968,100
Repurchase of common stock, value		$ (9,103,962)				(9,103,962)
Net loss				(1,847,363)		(1,847,363)
Ending balance, shares at Sep. 30, 2019	66,476,020	1,785,945
Ending balance, value at Sep. 30, 2019	$ 665	$ (17,649,014)	$ 133,827,909	$ (71,104,193)	$ 128,207	$ 45,203,574