Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares shares in Thousands	Mar. 31, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000	5,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	80,000	80,000
Common stock, shares issued (in shares)	13,788	13,552
Common stock, shares outstanding (in shares)	13,778	13,542
Common stock held in treasury, at cost, shares (in shares)	10	10
Series 1 Preferred Stock [Member]
Preferred stock, shares issued (in shares)	200	200
Preferred stock, shares outstanding (in shares)	200	200
Preferred stock, liquidation preference (in dollars per share)	$ 1,025	$ 1,013
Series 2 Preferred Stock [Member]
Preferred stock, shares issued (in shares)	420	460
Preferred stock, shares outstanding (in shares)	420	460
Preferred stock, liquidation preference (in dollars per share)	$ 1,068	$ 1,155
Series 3 Preferred Stock [Member]
Preferred stock, shares issued (in shares)	266	289
Preferred stock, shares outstanding (in shares)	266	289
Preferred stock, liquidation preference (in dollars per share)	$ 590	$ 634