CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Redeemable preferred stock [Member]	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Cumulative translation adjustment [Member]	Non controlling interests [Member]	Total
Balance at Dec. 31, 2017	$ 20,093	$ 8,951,321	$ 86,405,387	$ 53,105,196	$ (549,555)	$ 8,088,935	$ 156,021,377
Balance (in shares) at Dec. 31, 2017	33,488	14,918,869
Issuance of stock	$ 4,445	$ 34,938	(39,383)	0	0	0	0
Issuance of stock (in shares)	7,409	58,228
Conversion of preferred stock	$ (3,485)	$ 3,485	0	0	0	0	0
Conversion of preferred stock (in shares)	(5,809)	5,809
Buyback of preferred stock	$ (976)	$ 0	(16,362)	0	0	0	(17,338)
Buyback of preferred stock (in shares)	(1,627)	0
Net income	$ 0	$ 0	0	11,293,487	0	695,787	11,989,274
Exercise of options	$ 801	$ 0	12,175	0	0	0	12,976
Exercise of options (in shares)	1,335	0
Dividends declared	$ 0	$ 0	0	(5,100,522)	0	0	(5,100,522)
Stock-based compensation	0	0	850,136	0	0	0	850,136
Balance at Dec. 31, 2018	$ 20,878	$ 8,989,744	87,211,953	59,298,161	(549,555)	8,784,722	163,755,903
Balance (in shares) at Dec. 31, 2018	34,796	14,982,906
Issuance of stock	$ 4,376	$ 35,683	(40,059)	0	0	0	0
Issuance of stock (in shares)	7,293	59,472
Conversion of preferred stock	$ (4,338)	$ 4,338	0	0	0	0	0
Conversion of preferred stock (in shares)	(7,230)	7,230
Buyback of preferred stock	$ (1,605)	$ 0	(22,491)	0	0	0	(24,096)
Buyback of preferred stock (in shares)	(2,674)	0
Net income	$ 0	$ 0	0	12,176,093	0	1,549,978	13,726,071
Exercise of options	$ 940	$ 0	14,882	0	0	0	$ 15,822
Exercise of options (in shares)	1,566	0					1,566
PERC non-controlling interest at acquisition date	$ 0	$ 0	0	0	0	3,617,634	$ 3,617,634
Sale of CW-Bali	0	0	0	0	549,555	241,282	790,837
Dividends declared	0	0	0	(5,121,521)	0	0	(5,121,521)
Stock-based compensation	0	0	1,192,224	0	0	0	1,192,224
Balance at Dec. 31, 2019	$ 20,251	$ 9,029,765	$ 88,356,509	$ 66,352,733	$ 0	$ 14,193,616	$ 177,952,874
Balance (in shares) at Dec. 31, 2019	33,751	15,049,608