Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares shares in Thousands	Jun. 30, 2016	Dec. 31, 2015
Series 1 [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)	$ 1,088	$ 1,063
Series 2 [Member]
Preferred stock, shares issued (in shares)	460	460
Preferred stock, shares outstanding (in shares)	460	460
Preferred stock, liquidation preference (in dollars per share)	$ 1,241	$ 1,212
Series 3 [Member]
Preferred stock, shares issued (in shares)	289	289
Preferred stock, shares outstanding (in shares)	289	289
Preferred stock, liquidation preference (in dollars per share)	$ 681	$ 665
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)	12,758	12,622
Common stock, shares outstanding (in shares)	12,748	12,612
Common stock held in treasury, shares (in shares)	10	10