Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Equity securities, cost basis	$ 20,750	$ 25,500
Limited liability investments held by VIE	4,013	0
Cash and cash equivalents held by VIE	$ 987	$ 0
Series A Preferred stock, par value	$ 25.00	$ 25.00
Series A Preferred stock, shares authorized	1,000,000	1,000,000
Series A Preferred stock, shares issued	700,000	700,000
Series A Preferred stock, shares outstanding	700,000	700,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	6,269,821	6,217,307
Common stock, shares outstanding	4,988,310	6,065,948
Treasury stock, shares	1,281,511	151,359