Condensed Consolidated Statement of Shareholders' Equity and Redeemable Shares (Unaudited) - USD ($)	Class A Redeemable Common Shares [Member]	Class B Redeemable Common Shares [Member]	Class C Redeemable Common Shares [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	500	8,653	3,771
Balance at Dec. 31, 2017	$ 605,143	$ 10,472,602	$ 4,563,987
Net income				575,556		575,556
Other comprehensive income (loss), net					(139,948)	(139,948)
Cumulative effect of change in accounting principle (ASU 2014-09)					52,698
Accretion of shares to redemption value	$ 18,891	$ 326,935	$ 142,480	(575,556)	87,250	(435,608)
Balance (in shares) at Mar. 31, 2018	500	8,653	3,771
Balance at Mar. 31, 2018	$ 624,034	$ 10,799,537	$ 4,706,467
Balance (in shares) at Dec. 31, 2018	491	8,554	3,521
Balance at Dec. 31, 2018	$ 665,095	$ 11,587,018	$ 4,769,451
Net income				400,914		400,914
Other comprehensive income (loss), net					184,273	184,273
Accretion of shares to redemption value	$ 22,866	$ 398,351	$ 163,970	(400,914)	(184,273)	(585,187)
Balance (in shares) at Mar. 31, 2019	491	8,554	3,521
Balance at Mar. 31, 2019	$ 687,961	$ 11,985,369	$ 4,933,421