STOCKHOLDERS' EQUITY (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) item $ / shares shares	Dec. 31, 2020 USD ($) item $ / shares shares	Dec. 31, 2019 USD ($)
Stockholders' equity
Preferred stock par value (in dollars per share) | $ / shares	$ 1	$ 1
Number of classes of preferred stock outstanding | item		1
Dividend paid | $	$ 3,824,311	$ 216,642	$ 219,825
Common stock authorized (in shares) | shares	100,000,000	100,000,000
Common stock no par value (in dollars per share) | $ / shares	$ 0	$ 0
Common stock outstanding (in shares) | shares	33,484,935	33,957,204
Treasury shares | shares	528,169
Number of shares issued for convertible preferred stock | shares	405,495
Preferred Class A [Member]
Stockholders' equity
Preferred stock authorized (in shares) | shares	5,000,000
Preferred stock par value (in dollars per share) | $ / shares	$ 1.00
Preferred Class B
Stockholders' equity
Preferred stock authorized (in shares) | shares	5,000,000	5,000,000
Preferred stock par value (in dollars per share) | $ / shares	$ 1.00
Number of series of preferred stock class B | item	2
Preferred stock, remaining authorized shares to which series have Not been assigned | shares	4,767,555
Series II, Class B
Stockholders' equity
Preferred stock par value (in dollars per share) | $ / shares	$ 1	$ 1
Preferred stock outstanding (in shares) | shares	156,200	156,200
Cumulative annual dividend payable quarterly (in dollars per share) | $ / shares	$ 1.00
Dividend paid | $	$ 156,200	$ 168,642
Preferred stock dividend in arrears | $	$ 0
Preferred stock redemption price (in dollars per share) | $ / shares	$ 15.00
Preferred stock conversion ratio	1
Number of shares of preferred stock converted into common stock | shares	0	15,000
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share) | $ / shares	$ 12.50
Number of consecutive quarters in which preferred stockholders have no voting right until dividends are in arrears | item	12
Right of preferred stock holders to elect a specified proportion of board of directors	0.33
Series III, Class B
Stockholders' equity
Preferred stock par value (in dollars per share) | $ / shares	$ 1	$ 1
Preferred stock outstanding (in shares) | shares	76,245	106,745
Cumulative annual dividend payable quarterly (in dollars per share) | $ / shares	$ 1.00
Dividend paid | $	$ 3,245,693	$ 0
Preferred stock dividend in arrears | $	$ 0
Preferred stock redemption price (in dollars per share) | $ / shares	$ 15.00
Preferred stock conversion ratio	1
Number of shares of preferred stock converted into common stock | shares	30,500	0
Exchanged for Common Stock | shares		22,500
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share) | $ / shares	$ 12.50
Preferred Class C [Member]
Stockholders' equity
Preferred stock authorized (in shares) | shares	5,000,000
Preferred stock par value (in dollars per share) | $ / shares	$ 1.00