Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings
Balance, beginning of period (in shares) at Dec. 31, 2018		47,932,305
Balance, beginning of period at Dec. 31, 2018	$ 45,255,859	$ 49,708	$ 28,027,742	$ (2,895,683)	$ (2,609,485)	$ 22,683,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	66,714		66,714
Stock issued in exercise of stock options (in shares)		2,483
Stock issued in exercise of stock options	0	$ 2	(2)
Stock issued in settlement of RSUs (in shares)		148,723
Stock issued in settlement of RSUs	379,861	$ 149	379,712
Tax withholdings paid related to stock based compensation	(143,022)		(143,022)
Treasury stock repurchased (in shares)		(775,287)
Treasury stock repurchased	(1,333,578)				(1,333,578)
Foreign currency translation	149,415			149,415
Unrealized gains on investments	68,752			68,752
Net income	1,668,618					1,668,618
Balance, end of period (in shares) at Mar. 31, 2019		47,308,224
Balance, end of period at Mar. 31, 2019	46,112,619	$ 49,859	28,331,144	(2,677,516)	(3,943,063)	24,352,195
Balance, beginning of period (in shares) at Dec. 31, 2019		47,411,977
Balance, beginning of period at Dec. 31, 2019	46,571,586	$ 50,824	29,584,172	(2,415,460)	(5,353,019)	24,705,069
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	66,348		66,348
Stock issued in exercise of stock options (in shares)		2,000
Stock issued in exercise of stock options	2,020	$ 2	2,018
Stock issued in settlement of RSUs (in shares)		271,684
Stock issued in settlement of RSUs	419,373	$ 272	419,101
Tax withholdings paid related to stock based compensation	(148,879)		(148,879)
Foreign currency translation	(945,423)			(945,423)
Unrealized gains on investments	(157,354)			(157,354)
Net income	(365,264)					(365,264)
Balance, end of period (in shares) at Mar. 31, 2020		47,685,661
Balance, end of period at Mar. 31, 2020	$ 45,442,407	$ 51,098	$ 29,922,760	$ (3,518,237)	$ (5,353,019)	$ 24,339,805