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1. Nature of Activities and Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]                    
Net income (loss) $ (6,453) $ (5,755) $ (6,287) $ (8,643) $ (3,740) $ 464 $ 2,722 $ 7,687 $ (27,138) $ 7,133
Shares                    
Weighted average shares outstanding-basic                 19,823 20,371
Weighted average dilutive share equivalents from preferred shares                 0 220
Weighted average dilutive share equivalents from stock options                 0 269
Weighted average dilutive share equivalents from common warrants                 0 187
Weighted average shares outstanding-diluted 19,598 19,521 19,590 20,595 20,630 21,476 20,948 22,657 19,823 21,047
Earnings (loss) per share-basic                 $ (1.37) $ 0.35
Earnings (loss) per share-diluted                 $ (1.37) $ 0.34