Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 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)	14,939	13,552
Common stock, shares outstanding (in shares)	14,929	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)	0	200
Preferred stock, shares outstanding (in shares)	0	200
Preferred stock, liquidation preference		$ 1,013
Series 2 Preferred Stock [Member]
Preferred stock, shares issued (in shares)	0	460
Preferred stock, shares outstanding (in shares)	0	460
Preferred stock, liquidation preference		$ 1,155
Series 3 Preferred Stock [Member]
Preferred stock, shares issued (in shares)	0	289
Preferred stock, shares outstanding (in shares)	0	289
Preferred stock, liquidation preference		$ 634