Stockholders' equity

3 Months Ended

Mar. 31, 2019

Stockholders' Equity Note [Abstract]

Stockholders' equity

Note 14 – Stockholders' equity

The changes of each caption of stockholders' equity for the three-month period ended March 31, 2019 are as follows:

	Series B Preferred Stock				Common Stock							Additional				Accumulated Other			Total
	Number of Shares		Amount		Number of Shares		Amount		Treasury Stock			Paid-in Capital		Retained Earnings		Comprehensive Income (Loss)			Stockholders' Equity
			US$				US$
Balance as of January 1, 2019		1,000,000		100		50,948,841		5097		(92,694	)		86,633,582		717,103,890		(54,732,547	)		748,917,428
Net income		-		-		-		-		-			-		10,980,715		-			10,980,715
Other comprehensive income		-		-		-		-		-			-		-		14,670,801			14,670,801
Balance as of March 31, 2019		1,000,000		100		50,948,841		5097		(92,694	)		86,633,582		728,084,605		(40,061,746	)		774,568,944